Ultimate Mark

Special Feature:
Universal Century Timeline
> Back to Gundam Unofficial

This timeline of Gundam's Universal Century is, of course, a work in progress. For the time being it extends only up through the end of the One Year War, with the events of later stories to be added in stages. It's based on the timelines published in MediaWorks's Data Collection books, which are in turn updated versions of those in Bandai's Entertainment Bible series. The Data Collection timeline appears to be the current official standard, and is reproduced in official Sunrise publications such as event programs and museum catalogs.

I've also added events from several other publications, including books, magazines, model kit manuals, DVD liner notes, and the Zeon Military File CD-ROM. I've listed the source of each addition, in some cases noting conflicting accounts and explaining why I chose the ones I did. Note that Kodansha's Sunrise-approved Gundam Officials encylopedia is mostly a compilation of previously published information, so I've credited it only when it corrects or adds to these primary sources.

Timeline for:


Select a series or calendar year.

U.C. 0001

With Earth's population at 9 billion, an ambitious space colonization program begins. The calendar is changed to the Universal Century era.

U.C. 0009

Zeon Zum Deikun is born.
* Source: Gundam Officials.

U.C. 0010

The Jupiter Energy Fleet is reorganized as the Jupiter Development Enterprise Group.

U.C. 0016

The Earth Federation government establishes the Frontier Settlement Transport Bureau.

U.C. 0022

The Earth Federation government declares that war has been eradicated from the surface of the Earth.
* Source: Gundam Officials.

U.C. 0027

Von Braun, the first permanent lunar settlement, is established.

U.C. 0030

The Federation government privatizes the Frontier Settlement Transport Bureau, which becomes the Space Transport Enterprise Group.

U.C. 0034

The Federation government again reorganizes the Space Transport Enterprise Group, forming the Public Corporation of Space Transport (PCST), an independent non-governmental organization.

Construction of Side 2 is completed.
* Source: MS ERA 0099.

U.C. 0035

Construction of Side 3 begins.

U.C. 0040

40% of the human population (roughly 5 billion people) has emigrated to space.
* A later entry in the official timeline claims that 9 billion people, out of a total population of 11 billion, have emigrated to space by U.C. 0050. However, this is contradicted by the opening narration of the Gundam II and Gundam III movies, which state that half of humanity now lives in space.

U.C. 0045

The asteroid Juno, later known as Luna II, is placed in Earth orbit to help with space colony construction.

The Minovsky Physics Society is founded at the Side 3 colony cluster.

U.C. 0046

Zeon Zum Deikun formulates the ideology known as Contolism. Deikun argues that humanity should complete its migration to space, and that the space colonies should be treated as independent nations.
* Source: Gundam Officials. MS ERA 0099 claims that this happens the previous year.

U.C. 0047

Development of the Minovsky-Ionesco fusion reactor begins.

U.C. 0051

The Earth Federation halts construction of new space colonies, and the colonization program is effectively ended.

U.C. 0052

Zeon Zum Deikun moves to Side 3 to spread his ideology of Contolism.

U.C. 0055

The Buch Concern is established.

U.C. 0058.09.14

Side 3 declares its independence, and the Republic of Zeon is established. A National Guard is formed.
* The month and day are specified in the Master Grade RX-75 Guntank manual.

U.C. 0059

The Federation government applies economic pressure against Side 3.

The Earth Federation Space Force is established.
* Source: Entertainment Bible 1.

Casval Rem Deikun, the son of Zeon Deikun, is born.
* Gundam Officials is uncertain whether Casval is born on September 27 or November 17. In either case he'd be just nineteen years old as Mobile Suit Gundam begins, although he's supposed to be twenty at that point.

U.C. 0060

The Federation Forces launch the '60s Armament Reinforcement Plan. Luna II is converted into a military base.

U.C. 0062

The Zeon National Guard is promoted to the status of a full-fledged military.

U.C. 0062.09.12

Artesia Som Deikun, the daughter of Zeon Deikun, is born.
* Source: Gundam Ace 020.

U.C. 0063.11.04

Amuro Ray is born.
* Source: Gundam Ace 001. Although Amuro is fifteen as Mobile Suit Gundam begins, he has turned sixteen by the time he meets Char Aznable at Side 6's Palda colony.

U.C. 0064

The Federation Forces hold a naval review. The new spaceships developed as part of the Armament Reinforcement Plan take center stage.

U.C. 0065.03.14

The researchers of the Minovsky Physics Society observe a unique electromagnetic effect within the Minovsky-Ionesco fusion reactor, leading to the discovery of the Minovsky particle.
* The month and day are specified in the Master Grade RX-75 Guntank manual.

U.C. 0067

The Federation government rejects a motion for colonial autonomy.

U.C. 0067.01.10

Haman Karn is born.
* Source: Gundam Ace 002.

U.C. 0068

The Buch Concern purchases the name of Europe's Ronah family.

U.C. 0068.10

Zeon Zum Deikun dies under suspicious circumstances, and Degwin Sodo Zabi succeeds him as leader.
* MS ERA 0099 claims that Deikun's death takes place in October of this year.

The political conflict between the followers of Zeon Deikun and Degwin Zabi escalates. Sasro Zabi, Degwin's second son, is assassinated in what appears to be an act of revenge by Deikun's followers.
* Although some sources place the assassination of Sasro closer to the foundation of the Principality of Zeon, Gundam Officials and Gundam The Origin indicate that it closely follows Deikun's death.

U.C. 0069

The existence of the Minovsky particle is confirmed.
* Source: Gundam Officials.

U.C. 0069.08

Zeon Zum Deikun's followers are purged from Side 3. Deikun's children Casval and Artesia are taken to Earth for their protection.
* Source: The Encyclopedia of Gundam.

U.C. 0069.08.15

Degwin Sodo Zabi declares himself sovereign and establishes the Principality of Zeon.

U.C. 0069.10

The Principality of Zeon commissions the first ship of the Papua class.
* According to Gundam Century and Gundam Officials, the Papua was originally designed as a missile cruiser and later converted to a transport ship.

U.C. 0070.03

The Principality of Zeon successfully experiments with the Minovsky effect, using the dispersion of Minovsky particles to jam radar.

U.C. 0070.05

The Principality of Zeon completes the mega particle cannon.

U.C. 0070.06

The Principality of Zeon commissions the first ship of the Chivvay class.
* According to Gundam Officials, the Chivvay was originally classified as a battleship and later redesignated as a heavy cruiser.

U.C. 0070.09

The Federation Forces '70s Armament Reinforcement Plan produces the Salamis-class space cruiser and Magellan-class space battleship.

U.C. 0070.10

The Principality of Zeon dispatches its first Jupiter Fleet to collect helium from the planet's atmosphere.
* Source: The Encyclopedia of Gundam.

U.C. 0070.12

Luna II is moved to Lagrange point 3, a position in Earth orbit opposite that of the moon, in order to help construct Side 7.

U.C. 0071

The Principality of Zeon begins development of new weapons for use in the era of Minovsky physics. The compact fusion reactor is completed.

The Federation Forces complete the FF-S3 Saberfish aerospace fighter.
* Source: Entertainment Bible 1.

Gihren Zabi proclaims his Survival of the Selected theory.
* This is the English translation used in Gundam Officials. Literally, it's something like Survival of the Superior Race.

U.C. 0072

In the asteroid belt, the Principality of Zeon begins construction of the asteroid base Axis.

The scientist Doctor Minovsky defects from the Principality.

The Principality of Zeon begins the development of the mobile tank Hildolfr.
* Source: MS Igloo: 603rd Technical Evaluation Unit Interim Report.

U.C. 0073

The Principality of Zeon completes the first prototype mobile suit, the MS-01.
* According to the Zeon Military File, the candidate machines ZI-XA3 and MIP-X1 were completed in October of this year, and the ZI-XA3 was subsequently adopted as the MS-01.

U.C. 0074

Following the MS-02 and MS-03, the Principality of Zeon completes the MS-04, a prototype mobile suit equipped with a super-compact fusion reactor based on Minovsky physics.
* Source: MS ERA 0099. See footnote 1: MS-05 Zaku Series.

Casval Rem Deikun returns to Side 3 under the alias Char Aznable.
* Source: MS ERA 0099. This is also the date given in the Gundam The Origin comic serial. MS ERA and Gundam The Origin indicate that Char enters the Principality's military academy this same year, but other sources claim that he doesn't do so until U.C. 0075 or 0076.

U.C. 0074.02

The Principality of Zeon rolls out the first unit of the MS-03, a prototype mobile suit designed for combat use.
* Source: Gundam Century. See footnote 1: MS-05 Zaku Series.

U.C. 0074.04

The Principality of Zeon commissions the first of an improved type of Papua-class transport ship.
* According to Gundam Officials, this new version features a Minovsky fusion reactor, and its missile storage has been converted to cargo space.

U.C. 0074.12

The first Jupiter Fleet returns to the Principality of Zeon.
* Source: The Encyclopedia of Gundam.

U.C. 0075

The Principality of Zeon conducts tests of its prototype mobile suits. The EMS-04 Zudah is rejected in favor of the YMS-05 Zaku I.
* Source: MS Igloo Complete Setting Materials Collection.

U.C. 0075.05

The Principality of Zeon rolls out a combat version of the MS-05 Zaku I.
* Source: Entertainment Bible 1. Some sources, including Gundam Century, date this event to August of U.C. 0075. See footnote 1: MS-05 Zaku Series.

U.C. 0075.07

The Principality of Zeon commissions its first Musai-class space cruiser, a warship designed to carry mobile suits.

The Principality of Zeon decides to mass produce the MS-05 Zaku I.
* Source: Entertainment Bible 1. See footnote 1: MS-05 Zaku Series.

U.C. 0075.11

The Principality of Zeon forms a mobile suit training battalion.

U.C. 0076.02

The first production run of the MS-05 Zaku I comes to an end.
* Source: Entertainment Bible 1. See footnote 1: MS-05 Zaku Series.

U.C. 0076.03

The Principality of Zeon commissions the first Gwazine-class space battleship.

U.C. 0076.04

The Principality of Zeon expands its mobile suit production facilities.

U.C. 0076.05

The Principality of Zeon's Mobile Training Battalion secretly begins practicing combat manuevers.

U.C. 0076.06

The Principality of Zeon commissions the first Zanzibar-class mobile cruiser.

U.C. 0076.09

Christina Mackenzie enters the Federation Space Force military academy.
* Source: Gundam The OVA Movies VII.

U.C. 0076.12

Anticipating a possible Earth invasion, the Principality of Zeon begins developing specialized mobile suits for land and sea warfare.

U.C. 0077

As part of their 0077 Armament Reinforcement Plan, the Federation Forces launch the SCV-X project, which focuses on space vessel construction and consists of several simultaneous development projects. The SCV-27 open-decked space carrier plan is adopted.
* Source: The Encyclopedia of Gundam. This event was first mentioned in Mobile Suit Variation 2.

The Principality of Zeon rejects the YMT-05 Hildolfr due to its evaluation test results.
* Source: MS Igloo Complete Setting Materials Collection.

Thanks to a wartime exemption, Char Aznable graduates ahead of schedule from the Principality of Zeon's military academy.
* Source: Gundam Officials.

U.C. 0077.04

The Federation Forces complete the development of Minovsky Craft technology.
* Source: Zeta Gundam Part 3.

U.C. 0077.07

The Principality of Zeon deploys MS-05 Zaku I forces to support a revolution at Side 6. The Federation Forces obtain data on the Principality's mobile suit technology.
* Source: MS ERA 0099. Although MS ERA says only that this event takes place in U.C. 0077, the original account in Gundam Century specifies that it happens in July, and The Encyclopedia of Gundam gives the same date for the establishment of the Rank administration.

U.C. 0077.08

The Principality of Zeon rolls out the prototype MS-06A Zaku II.

U.C. 0077.10 (LATE)

The Principality of Zeon begins production of the final version of the MS-05B Zaku I.
* Source: Master Grade MS-05B Zaku manual.

U.C. 0077.12

The Principality of Zeon continues its preparations for a war of independence at a rapid pitch, and expands its territory on the lunar surface.
* Source: Gundam Ace 026. The original account in Gundam Century attributes this to the Principality's Zaku forces.

U.C. 0078

Christina Mackenzie graduates from the Federation Space Force military academy at the top of her class.
* Source: Gundam The OVA Movies VII.

U.C. 0078.01

The Principality of Zeon begins mass production of the MS-06 Zaku II.
* See footnote 2: MS-06 Zaku II Series.

U.C. 0078.02

Inter-colony transportation accidents become frequent.
* These accidents are actually due to secret maneuvers by Zeon mobile suits. Around this time, according to Gundam Officials, the Principality of Zeon deliberately leaks its plans for an armed invasion of Side 2 in order to test the Federation's reaction.

The Federation Forces begin the construction of three Pegasus-class mobile assault carriers at their Jaburo headquarters in South America.
* Source: Mobile Suit Variation 3.

U.C. 0078.03

The Federation Forces launch a secret mobile suit development program. Several projects are begun simultaneously as part of the RX Project.

U.C. 0078.04

The Federation Forces strengthen their colony garrisons.

U.C. 0078.05

Migration begins to Side 7's incomplete Colony 1.

The Principality of Zeon begins developing new mobile weapons with greater firepower than mobile suits.
* Source: B-CLUB 50.

U.C. 0078.06

The Principality of Zeon begins development of the Tivvay, a heavy cruiser of the Chivvay class.

The Principality of Zeon considers a plan for a higher performance version of the Zaku II.
* Source: Master Grade MS-06R-1 Shin Matsunaga's Zaku II manual. The plan is shelved in favor of the MS-06S type, which can be produced on standard production lines.

U.C. 0078.09 (LATE)

The Principality of Zeon rolls out the improved MS-06F Zaku II.
* Source: Master Grade MS-06F/J Zaku II manual. See footnote 2: MS-06 Zaku II Series.

U.C. 0078.10

The Principality of Zeon announces a state of national mobilization. The Zeon military is divided into a Space Attack Force commanded by Dozle Zabi, and a Mobile Assault Force led by Kycilia Zabi.

The Principality of Zeon begins production of the MS-06J Zaku II, designed for land warfare.
* Source: Gundam Officials.

The Principality of Zeon establishes the 603rd Technical Evaluation Unit.
* Source: MS Igloo: 603rd Technical Evaluation Unit Interim Report.

The Principality of Zeon uses armed force to suppress a rebellion at Side 3's Kintzem colony.
* Source: MS ERA 0099.

U.C. 0078.11

The Federation Forces hold a naval review.

U.C. 0078.12

The Principality of Zeon secretly begins development of the Dolos-class carrier.

The Principality of Zeon shifts its mobile suit production to the MS-06F Zaku II, devoting 80 percent of its production facilities to this model.
* Source: Gundam Officials.

U.C. 0079.01.03

The One Week Battle begins. During this first week of the One Year War, the indiscriminate use of nuclear, biological, and chemical weapons claims the lives of 2.8 billion space colonists.
* See footnote 3: Casualties of War.

07:20   The Principality of Zeon declares war against the Earth Federation. The Principality carries out surprise attacks on the Federation's patrol fleets, and launches indiscriminate assaults on Sides 1, 2, and 4.
* Source: Entertainment Bible 39.

08:50   The news that war has broken out is relayed throughout the Federation fleet.
* Source: Entertainment Bible 39.

U.C. 0079.01.04

The Principality's 603rd Technical Evaluation Unit receives the QCX-76A Jormungand.
(MS Igloo: The Hidden One Year War episode 1)
* The date is specified in the episode itself.

Operation British begins. The Principality of Zeon moves a space colony out of orbit in an attempt to destroy Jaburo, the Federation Forces headquarters in South America.

21:30   The Principality of Zeon launches Operation British. Side 2's Colony 8 is moved out of its regular orbit and begins falling toward Earth.
* Source: Entertainment Bible 39.

U.C. 0079.01.05

The Federation Forces determine that Jaburo is the target of the falling colony.
* Source: Entertainment Bible 39.

04:50   The Federation Forces assemble all fleets that are capable of intercepting the colony.
* Source: Entertainment Bible 39.

U.C. 0079.01.06

12:00   The Federation Forces begin attacking the falling colony, but their efforts are hindered by the Principality space fleet escorting it.
* Source: Entertainment Bible 39.

U.C. 0079.01.08

Ramba Ral carries out a guerilla attack on a Side 1 industrial colony, taking the Federation Forces garrison by surprise and capturing the colony's facilities intact.
* Source: Master Grade MS-05B Ramba Ral's Zaku manual.

13:15   Admiral Tianem, commander of the Federation's 4th Fleet, concludes that the Principality escort fleet must be eliminated before the falling colony can be destroyed. The Federation Forces engage the escort fleet directly.
* Source: Entertainment Bible 39.

16:10   The Federation's 4th Fleet withdraws after losing 70% of its strength.
* Source: Entertainment Bible 39.

U.C. 0079.01.09

The Federation Forces launch nuclear missiles from Earth to attack the falling colony, but are unable to destroy it. As the colony passes the critical intercept point, the Federation Forces halt their attacks, fearing that its fragments will fall across the entire planet.
* Source: Gundam Officials.

U.C. 0079.01.10

02:50   The Federation Forces begin the evacuation of Jaburo.
* Source: Entertainment Bible 39.

08:27   The falling colony enters the atmosphere.
* Source: Entertainment Bible 39.

08:35   The colony breaks up over Arabia.
* Source: Entertainment Bible 39.

08:41   The front section of the colony falls onto the east coast of Australia (local time 18:41). Meanwhile, fragments of its rear section scatter across North America and the Pacific Ocean. The impact claims 200 million lives, and the drastic climate changes caused by the colony drop lead to many more casualties.
* Source: Entertainment Bible 39. See footnote 3: Casualties of War.

09:00   The Principality escort fleet withdraws after confirming the failure of Operation British. The One Week Battle ends.
* Source: Entertainment Bible 39.

U.C. 0079.01.11

The space colonies of Side 6 declare their neutrality. Their neutral status is recognized by both the Earth Federation and the Principality of Zeon.

U.C. 0079.01.12

The Federation Forces Supreme Staff Council meets to consider its response to the Principality of Zeon. The Federation Forces reinforce their space surveillance network to monitor the Principality's activities.
* Source: Entertainment Bible 39.

U.C. 0079.01.13

19:20   The Principality of Zeon resumes Operation British. A space fleet under the command of Dozle Zabi departs from Solomon. Its destination is Side 5, also known as Loum.
* Source: Entertainment Bible 39. See footnote 4: Transit Times.

20:00   The Federation Forces detect the movements of the Principality fleet and launch their own counteroffensive.
* Source: Entertainment Bible 39.

U.C. 0079.01.15

The Battle of Loum begins. This battle will ultimately result in the virtual annihilation of the Federation Space Force and the destruction of the Side 5 colony cluster.
* See footnote 3: Casualties of War.

11:20   The Principality fleet begins its attack on Side 5. Principality forces begin attaching nuclear pulse engines to Side 5's Colony 11.
* Source: Entertainment Bible 39.

22:14   The Federation's 1st Combined Fleet, commanded by General Revil, engages the Principality fleet.
* Source: Entertainment Bible 39. Entertainment Bible 39 and Gundam Officials claim that this fleet departed from Luna II at 09:00 the previous day in response to the movements of the enemy fleet, but this doesn't allow enough time for it to reach Side 5. See footnote 4: Transit Times.

22:40   Dozle Zabi orders the Principality forces to abandon the attachment of nuclear pulse engines to the colony and concentrate on attacking the Federation fleet.
* Source: Entertainment Bible 39.

The Principality's 603rd Technical Evaluation Unit performs a combat test of the Jormungand during the Battle of Loum.
(MS Igloo: The Hidden One Year War episode 1)
* The date is specified in the episode itself.

U.C. 0079.01.16

01:00   At this point more than half of the Federation fleet has been destroyed.
* Source: Entertainment Bible 39.

03:10   The Federation Forces flagship Ananke is destroyed. General Revil is captured by the Principality's Black Tri-Stars special forces team.
* Source: Entertainment Bible 39.

04:24   The Federation fleet begins withdrawing from the battlefield.
* Source: Entertainment Bible 39. The Federation fleet is divided into three groups headed for Lagrange point 4, Lagrange point 5, and Earth. Dozle Zabi orders the Principality forces to pursue the Earth-bound group.

04:55   The Magellan-class battleship Nereid acts as a shield to cover the escape of the Federation fleet.
* Source: Entertainment Bible 39. The Nereid turns back to protect the Federation ships that are escaping to Earth.

05:14   The Nereid is destroyed.
* Source: Entertainment Bible 39.

06:00   Dozle Zabi decides to halt the operation, and the Battle of Loum comes to an end. The Principality forces return to Solomon and Side 3.
* Source: Entertainment Bible 39.

U.C. 0079.01.17

The Principality of Zeon broadcasts propaganda images of the captive General Revil throughout the Earth Sphere.
* Source: Gundam Officials.

Oliver May of the 603rd Technical Evaluation Unit completes his report on the Jormungand.
(MS Igloo: The Hidden One Year War episode 1)
* Source: MS Igloo: 603rd Technical Evaluation Unit Interim Report.

U.C. 0079.01.22

The Federation Forces secretly launch an operation to retrieve General Revil.
* Source: Gundam Officials.

U.C. 0079.01.28

Using Side 6 as an intermediary, the Principality of Zeon proposes a truce with the Earth Federation. Federation and Principality representatives meet in Antarctica for peace negotiations.
* Source: Entertainment Bible 39. MS ERA 0099, however, claims that these negotiations begin on January 26.

U.C. 0079.01.31

News of General Revil's escape reaches the negotiators in Antarctica. After Revil makes a worldwide broadcast claiming that the Principality of Zeon has exhausted its fighting strength, the Federation government decides to opt for a more limited wartime treaty rather than a genuine peace accord.
* Source: Entertainment Bible 39.

The Earth Federation and the Principality of Zeon conclude the Antarctic Treaty. This agreement bans the use of nuclear weapons, prohibits colony drops and other tactics of mass destruction, and guarantees the neutrality of Side 6 and the lunar cities.

U.C. 0079.02

Having decided to launch an Earth invasion operation, the Principality of Zeon begins full-scale development of amphibious mobile suits.
* Source: Master Grade MSM-07 Z'Gok manual.

The Principality of Zeon begins development of the MS-06R Zaku II.
* According to the Master Grade MS-06R Black Tri-Stars' Zaku II Ver. 2.0 manual, this takes place roughly one month after the outbreak of war, following the conclusion of the Antarctic Treaty.

U.C. 0079.02.01

The Principality of Zeon announces the formation of the Earth Attack Force, commanded by Garma Zabi.

U.C. 0079.02.07

The Principality of Zeon launches its Earth invasion operation.

U.C. 0079.02 (MID)

Using mass drivers on the lunar surface, the Principality of Zeon begins attacking target areas on Earth. The attacks continue until these facilities are destroyed by the remnants of the Federation fleet.
* Source: Gundam Officials.

U.C. 0079.02.13

The Federation Forces consider an interim plan for restoring their space fighting capabilities.
* Source: Master Grade RB-79K Ball manual. The development of the RB-79 Ball is based on this plan.

U.C. 0079.02.17

The Federation Forces complete a formal plan for Operation V.
* Source: Master Grade MS-07B Gouf Ver. 2.0 manual. This plan is not put into effect until April 1.

U.C. 0079.03.01

The Principality's Earth Attack Force stages its first landing operation. The 1st Terrestrial Mobile Division is deployed to Central Asia, and proceeds onward into Europe and the Middle East.

Principality forces land at the Aral Sea and Lake Balkhash, and forces from both landing sites advance toward the Baikonur spaceport.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.03.02

After capturing the Baikonur spaceport, the Principality's Central Asian forces advance westward to the north shore of the Caspian Sea.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

A Principality force from the Aral Sea landing point moves southward into the Middle East. The force splits as it reaches the Iranian Plateau, with one group heading west toward the Persian Gulf, and the other heading east toward the Afghan border.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.03.03

Principality forces continue westward from the Caspian Sea to Odessa.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.03.04

The Principality of Zeon deploys a resource mining unit to Central Asia. The unit lands at the north shore of the Caspian Sea.

U.C. 0079.03.07

The Principality's resource mining unit advances down the east shore of the Caspian Sea to the Elburz mountains.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.03.08

The Principality of Zeon deploys an advance decoy force to southern Mexico. This force moves south toward Panama.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.03.09

The Principality's resource mining unit advances down the west shore of the Caspian Sea, over the Caucasus mountains and into northern Iraq.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.03.11

The Principality's Earth Attack Force stages its second landing operation. The 2nd and 3rd Terrestrial Mobile Divisions are deployed to the west and east coasts of North America, respectively.
* According to Mobile Suit Variation 2, this is the first full-scale deployment of the MS-06J Zaku II.

Principality forces land near Seattle, Washington and Norfolk, Virginia.
* Source: Gundam Historica 03. While the map suggests the east coast landing site is in South Carolina, the accompanying text claims that it's near Norfolk. See footnote 5: Earth Invasion.

Principality forces commanded by Garma Zabi begin capturing Federation bases in North America. The Midnight Fenrir corps attack an air base in New Yark.
(Zeonic Front)
* Source: Zeonic Front: Mobile Suit Gundam 0079 Complete Guide.

U.C. 0079.03.12

The Principality's decoy force moves northward through central Mexico.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

The Federation's California Base continues to mount strong resistance, and the Midnight Fenrir corps are sent to break through the base's defensive lines.
(Zeonic Front)
* Source: Zeonic Front: Mobile Suit Gundam 0079 Complete Guide.

U.C. 0079.03.13

The Midnight Fenrir corps break through the defensive lines of the California Base and discover the entrance to an underground dock.
(Zeonic Front)
* Source: Zeonic Front: Mobile Suit Gundam 0079 Complete Guide.

The Principality of Zeon captures the Federation Forces' California base, which now becomes the stronghold of the Principality's Earth Attack Force.

The Principality's west coast forces advance southward to the California Base, and eastward across the Rocky Mountains to the Cypress Hills.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

The Principality's east coast forces advance westward across the Appalachian Mountains and the Ohio River, into Illinois.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.03.14

The Principality's west coast forces advance across the Rocky Mountains into Wyoming.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.03.15

The Principality's Middle Eastern forces advance across the Arabian Peninsula toward Aden.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

Principality forces continue southeast from the California Base, across the Colorado River and toward the Rio Grande.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

The Principality's east coast forces advance northward to capture New Yark.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.03.16

The Principality's east coast forces advance southwest across the Mississippi River and into Louisiana.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.03.18

The Principality's Earth Attack Force stages its third landing operation. The 4th Terrestrial Mobile Division is deployed to Oceania and Australasia.
* According to Mobile Suit Variation 2, this is the first combat deployment of the MS-07 Gouf. Entertainment Bible 1 claims that the Zaku Marine Type, now designated as the MSM-01, was sent to the California Base during this landing operation.

Principality forces land near Bangkok in Thailand, on Mindanao island in the Philippines, and in the Gulf of Carpentaria in northern Australia.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

The Principality's Philippine forces advance southwest across the Sulu Sea into Borneo.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

Principality forces continue eastward from the Cypress Hills, along the Missouri River and into Minnesota and Iowa.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

Principality forces continue eastward from Wyoming, along the Arkansas River and toward the Mississippi.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.03.20

The Federation Forces complete the RTX-44 anti-mobile suit weapon, which later becomes the development base for the RX-75 Guntank.
* Source: Mobile Suit Variation 3. According to the Master Grade RX-75 Guntank manual, four prototype units are completed.

U.C. 0079.03 (LATE)

The Principality's west and east coast forces meet along the Mississippi River.
* Source: Gundam Historica 03.

U.C. 0079.03.21

The Principality's Philippine forces advance northward into Luzon.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.03.25

The Principality's Southeast Asian forces advance northeast into southern China, and down the Malay Peninsula across the Strait of Malacca to Sumatra.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

The Principality's Australian forces advance west across the Great Sandy Desert to the Hammersley Range, and southwest to the Great Victoria Desert.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.03.28

The Principality's Southeast Asian forces advance northwest to the mouth of the Ganges River and into northern India.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.03.30

The Principality's Australian forces launch an invasion of New Zealand via the Tasman Sea.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.04

The Principality of Zeon completes the space fortress A Baoa Qu.
* Source: MS ERA 0099.

The Principality of Zeon rolls out the prototype MS-06RP Zaku II.
* Source: Zeon Military File.

The Black Tri-Stars carry out a special training assignment with the Principality of Zeon's Mobile Training Battalion.
* Source: Master Grade MS-05B Black Tri-Stars' Zaku manual.

U.C. 0079.04.01

The Federation Forces launch Operation V, a crash program to develop mobile suits and carrier ships, and the Vinson Plan, to rebuild their space fleet. The Federation Forces begin training mobile suit pilots.

U.C. 0079.04.02

The Principality's Middle Eastern forces advance westward to the Sinai peninsula.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

Principality forces continue northeast from Iowa, across the Mississippi River and toward the Great Lakes.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.04.04

The Principality of Zeon lands reserve forces on Earth, and deploys its "foreign legion" to Africa and the Middle East. Using captured resources and facilities, the Principality begins building up its military power.

The 5th Terrestrial Mobile Division of the Earth Attack Force lands in Egypt near Suez, and advances northward to Lebanon.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.04.15

The Principality's African forces advance westward across northern Libya.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.04.20

Principality forces continue westward from Libya, through Algeria to the Atlas Mountains in Morocco.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.04.29

The Federation's Semovente corps destroys the 128th Supply Depot in Arizona.
(MS Igloo: The Hidden One Year War episode 2)
* Source: MS Igloo: 603rd Technical Evaluation Unit Interim Report.

U.C. 0079.05

The Principality of Zeon completes the space fortress Solomon.

The Federation Forces complete a prototype version of the RX-77 Guncannon.
* Source: MS ERA 0099.

U.C. 0079.05.09

The Federation's Semovente corps destroys the 67th Supply Depot in Arizona.
(MS Igloo: The Hidden One Year War episode 2)
* Source: MS Igloo: 603rd Technical Evaluation Unit Interim Report.

The Principality's 603rd Technical Evaluation Unit performs a reevaluation of the YMT-05 Hildolfr.
(MS Igloo: The Hidden One Year War episode 2)
* The date is specified in the episode itself. During the evaluation, the Hildolfr engages the Semovente corps and destroys six captured Zaku II mobile suits and two tanks.

U.C. 0079.05.10

The Principality's African forces move southward through Sudan to the Uele River.
* Source: Gundam Historica 03. See footnote 5: Earth Invasion.

U.C. 0079.05.11

Oliver May of the 603rd Technical Evaluation Unit completes his report on the Hildolfr.
(MS Igloo: The Hidden One Year War episode 2)
* Source: MS Igloo: 603rd Technical Evaluation Unit Interim Report.

U.C. 0079.05 (LATE)

The Principality of Zeon begins combat deployment of the amphibious mobile suit MSM-03 Gogg in the Mediterranean and the Gulf of Mexico.
* Source: Gundam Officials. According to the MSV Handbook, deployment of the Gogg begins with a pre-production version, and a mass production type is introduced two months later.

The Federation Forces dispatch a naval fleet to recapture the Port Moresby base in New Guinea. The fleet is wiped out by the Principality's new amphibious mobile suits.
* Source: Gundam Ace 032. This battle, depicted in the Gundam Legacy serial, is apparently one of the first combat appearances of the MSM-03 Gogg.

U.C. 0079.06

The Principality of Zeon completes its defensive line, consisting of the asteroid fortresses Solomon and A Baoa Qu and the Granada lunar base.

The Flanagan Institute is established to investigate Newtype phenomena.

The Principality of Zeon organizes its first submarine fleet, which is stationed in the northern Pacific Ocean.
* Source: Entertainment Bible 39.

The Principality of Zeon completes a prototype of a new weapon known as the mobile armor.
* Source: Newtype magazine, August 1987.

The Federation Forces roll out a prototype version of the RB-79 Ball.
* Source: Master Grade Mobile Pod Ball Ver.Ka manual.

U.C. 0079.06 (LATE)

The Principality of Zeon begins production of the MS-06R-1A Zaku II.
* Source: Master Grade MS-06R-1A Black Tri-Stars' Zaku II manual.

U.C. 0079.07

Using Energy CAP (Capacitor) technology, the Federation Forces develop compact beam weapons that can be used by mobile suits.

The mobile assault carrier White Base, first of the Pegasus class, is commissioned.

The Principality of Zeon completes the formation of its submarine fleets, stationing forces in the Atlantic Ocean, Indian Ocean, and Arctic Ocean. These fleets begin attacking the Federation's remaining naval fleets and disrupting trade routes.
* Source: Entertainment Bible 39.

The Principality of Zeon rolls out the prototype MS-06R-2 Zaku II.
* Source: Master Grade MS-06R-1A Shin Matsunaga's Zaku II Ver. 2.0 manual.

The Principality of Zeon rolls out the MS-07 Gouf and begins the mass production of amphibious mobile suits
* Source: MS ERA 0099. According to Entertainment Bible 39, full-scale deployment of the MSM-03 Gogg begins early in this month.

The Principality of Zeon completes the MS-09 Dom.
* Source: Mobile Suit Variation 2. The August 1987 issue of Newtype magazine refers to this as the first mass production unit. According to the MSV series, however, the YMS-09 Prototype Dom rolls out more than six months after the start of the war, so this would probably be the prototype version. See footnote 6: MS-09 Dom Series.

The Black Tri-Stars use the MS-06R-1A Zaku II in combat for the first time. Engaging a Federation Forces reconnaissance fleet near Side 3, they destroy one Magellan-class battleship and a formation of Saberfish fighters.
* Source: Master Grade MS-06R-1A Black Tri-Stars' Zaku II manual.

U.C. 0079.07.07

The Federation Forces complete the first unit of the RX-78 Gundam. Trial production of the RX-79 model subsequently begins.
* Source: Master Archive Mobile Suit RGM-79 GM.

U.C. 0079.07 (LATE)

Shin Matsunaga conducts a familiarization flight with his newly received MS-06R-1 Zaku II.
* Source: Master Grade MS-06R-1 Shin Matsunaga's Zaku II manual. According to The Gundam Chronicles, Matsunaga continues using this machine until two months before the end of the One Year War.

U.C. 0079.07.31

The Principality of Zeon evaluates proposals for a new space mobile suit to replace the MS-06F Zaku II. The MS-06R-2 Zaku II is rejected in favor of the MS-09R Rick Dom.
* Source: Zeon Military File. See footnote 6: MS-09 Dom Series.

U.C. 0079.08

The Federation Forces begin final testing of the RX-78 Gundam at Side 7. Development of the RX-78NT-1 Gundam begins at the Augusta base in North America.

The Federation Forces roll out their first prototype mass production mobile suit.
* Source: Master Grade RGM-79 GM Ver. 2.0 manual.

The Principality of Zeon completes the design for its new Gelgoog mobile suit.
* According to Mobile Suit Variation 2, the Gelgoog itself is completed three months before the Principality develops beam weapons, which happens in November of this year. Its original model number is MS-11, and it is later redesignated as MS-14, but it's unclear exactly when this takes place.

Johnny Ridden receives the MS-06R-2 Zaku II.
* The Master Grade MS-06R-2 Johnny Ridden's Zaku II manual says that Ridden abandons this mobile suit in October, U.C. 0079, and according to Gundam Officials he uses it for a total of two months before that. Gundam Officials reports that Ridden destroys a total of two space battleships, four space cruisers, and five mobile suits during this time, but notes that he's also credited with a total of six warships for the entire One Year War. The 1/144 Gelgoog Cannon kit manual, which shows the kill markings next to Ridden's cockpit, supports the idea that these six warships represent his career total. See footnote 6: MS-09 Dom Series.

First shipment of the amphibious mobile suit MSM-07 Z'Gok from the California Base.
* Source: Mobile Suit Museum catalog. According to the catalog, this shipment takes place before an assault on Jaburo, presumably the one that takes place in September.

U.C. 0079.08.11

The Battle of Midway begins. The Federation's remaining naval fleets attempt to recapture the Hawaii naval base, and the Principality of Zeon deploys its amphibious mobile suits in their first full-scale battle.
* Source: Entertainment Bible 39.

U.C. 0079.08.14

The Battle of Midway ends in defeat for the Federation Forces.
* Source: Entertainment Bible 39.

U.C. 0079.08.20

The Principality's 603rd Technical Evaluation Unit begins an evaluation of the QEX-04M Aegir.
(MS Igloo 603)
* Source: MS Igloo Complete Setting Materials Collection.

U.C. 0079.08 (LATE)

The Federation Forces draft plans for an all-out counteroffensive against the Principality of Zeon.
* Source: Mobile Suit Variation 3. This counteroffensive is originally to be launched in late September, but is later rescheduled to early October.

U.C. 0079.08.22

Oliver May of the 603rd Technical Evaluation Unit completes his report on the Aegir.
(MS Igloo 603)
* Source: Gundam Ace 035. The date is specified in the story itself.

U.C. 0079.09

The Principality of Zeon begins combat deployment of the MSM-04 Acguy.
* Source: Zeon Military File.

The Principality of Zeon carries out mopping-up operations against the Federation's remaining naval fleets in the Atlantic Ocean.
* Source: Entertainment Bible 39.

The Principality of Zeon launches its first attack on the Federation Forces' Jaburo headquarters. The operation ends in failure.
* Source: Entertainment Bible 39.

Bernard Wiseman is conscripted into the Principality forces.
* Source: Gundam The OVA Movies VII.

U.C. 0079.09.01

The mobile assault carrier White Base is completed.
* Source: Mobile Suit Variation 3.

U.C. 0079.09.02

Mineva Lao Zabi, the daughter of Dozle Zabi, is born.
* Source: Gundam Ace 034.

U.C. 0079.09.15

The White Base launches from Jaburo to collect the RX-series mobile suits from Side 7.
* Source: Entertainment Bible 39. The same source also claims that the White Base stops at Luna II en route, but given the tight schedule and the lack of evidence to support this claim, I've omitted it from this timeline.

U.C. 0079.09.18

A Principality special forces team commanded by Char Aznable attacks Side 7. The RX-78 Gundam enters combat to repel the attack, and the survivors of the attack are evacuated aboard the White Base.
(Mobile Suit Gundam episode 1)
* This is officially the first battle between mobile suits in Universal Century history.

08:00   A Principality mobile suit team enters Side 7's Colony 1.
* Source: Entertainment Bible 39.

08:15   The White Base docks at Side 7's Colony 1.
* Source: Entertainment Bible 39.

09:15   The RX-78 Gundam, piloted by civilian Amuro Ray, destroys two Principality mobile suits.
* Source: Entertainment Bible 39.

16:50   The White Base departs Side 7, carrying the components of the RX-series mobile suits and more than a hundred civilian refugees.
* Source: Entertainment Bible 39.

U.C. 0079.09.19

The White Base docks at Luna II.
(Mobile Suit Gundam episode 4)
* Source: Gundam Ace 066. Although Entertainment Bible 39 places this event at 11:40 on September 20, most recent sources say September 19.

U.C. 0079.09.20

The White Base departs Luna II.
(Mobile Suit Gundam episode 4)
* Source: Gundam Ace 066. Although Entertainment Bible 39 places this event at 06:20 on September 22, most recent sources say September 20. This also leaves more time for the White Base to travel to Earth. See footnote 4: Transit Times.

U.C. 0079.09 (LATE)

The Federation Forces begin deployment of pre-production mobile suits in Southeast Asia.
* Source: The Encyclopedia of Gundam.

The Principality of Zeon begins production of the MS-09 Dom.
* Source: Master Grade MS-09 Dom manual. See footnote 6: MS-09 Dom Series.

Principality forces battle a Federation patrol squadron near the Granada lunar base. The Granada defense force destroys the Magellan-class battleship Holmes and the Salamis-class cruisers Schulhof and Botany. The Black Tri-Stars are credited with the destruction of two of these ships.
* Source: Master Grade MS-06R-1A Black Tri-Stars' Zaku II manual.

U.C. 0079.09.23

13:40   The White Base enters Earth's atmosphere, pursued by Char Aznable's special forces team.
(Mobile Suit Gundam episode 5)
* Source: Entertainment Bible 39. The Mobile Suit Gundam Official Web site places this event on September 20, but this seems implausibly early.

14:10   The White Base engages a Principality force commanded by Garma Zabi.
(Mobile Suit Gundam episode 6)
* Source: Entertainment Bible 39. This is presumably in standard time, so the local time on the east coast of North America would be 09:10. See footnote 7: Local Time.

U.C. 0079.10

The Federation Forces begin full-scale mass production of their own mobile suits.

The Flanagan Institute completes a prototype psycommu (psycho-communicator) system.

The Principality of Zeon begins combat deployment of the MS-09R Rick Dom.
* Source: MS ERA 0099. See footnote 6: MS-09 Dom Series.

The Principality of Zeon rolls out the prototype YMS-14 Gelgoog.
* Source: Master Grade MS-14S Char's Gelgoog manual.

The Principality of Zeon rolls out the prototype EMS-10 Zudah.
* Source: MS Igloo Complete Setting Materials Collection.

Johnny Ridden's MS-06R-2 Zaku II undergoes its fourth and final overhaul. A few days later, Ridden is reassigned to the Ace Corps.
* Source: Master Grade MS-06R-2 Johnny Ridden's Zaku II manual.

Ian Graden takes command of an MS-06K Zaku Cannon company stationed at the California Base.
* Source: Mobile Suit Variation 2.

The Federation Forces roll out the first RGC-80 GM Cannon.
* Source: Mobile Suit Variation 3.

U.C. 0079.10 (EARLY)

Personnel from the RX Project and Federation Forces staff headquarters hold a liaison conference. Based on data from the RX-78 Gundam, they decide to begin development of a Newtype mobile suit.
* Source: MSV Collection File: Earth Edition. This conference is mentioned in Mobile Suit Gundam episode 11. Since the development of the RX-78NT-1 Gundam began two months earlier, this would presumably mark a change in the direction of an existing project rather than the start of a new one.

U.C. 0079.10.01

Garma Zabi launches his fourth attack on the White Base. The White Base makes contact with a Federation Forces supply corps commanded by Matilda Ajan.
(Mobile Suit Gundam episode 9)
* Source: Gundam Officials.

U.C. 0079.10.04

Garma Zabi orders the Midnight Fenrir corps to assist in his pursuit of the White Base.
(Zeonic Front)
* Source: Zeonic Front: Mobile Suit Gundam 0079 Complete Guide.

Garma Zabi, commander of the Earth Attack Force, is killed in battle against the White Base.
(Mobile Suit Gundam episode 10)
* Entertainment Bible 39 claims that this takes place at 21:50, but the animation indicates that Garma's death occurs just before dawn. Although there's some disagreement as to the location, Gundam Officials reflects the consensus view that this battle takes place in Seattle, Washington.

U.C. 0079.10.05

The White Base contacts the Federation Forces and transfers its contingent of refugees.
(Mobile Suit Gundam episode 11)
* Source: Gundam Officials.

U.C. 0079.10.06

Gihren Zabi, commander in chief of the Principality forces, speaks at the funeral of his brother Garma. His fiery speech is broadcast worldwide.
(Mobile Suit Gundam episode 12)

Ramba Ral descends to Earth with orders to avenge Garma's death. He attacks the White Base in the northern Pacific Ocean.
(Mobile Suit Gundam episode 12)

Principality forces enter Federation-controlled airspace in Earth orbit in order to gather mobile suit combat data.
(08th MS Team episode 1)
* Source: Sunrise Art Works: The 08th MS Team.

U.C. 0079.10.07

While en route to Odessa, the Midnight Fenrir corps join the defense of a Principality supply base in the Gobi Desert.
(Zeonic Front)
* Source: Zeonic Front: Mobile Suit Gundam 0079 Complete Guide.

U.C. 0079.10.08

Shiro Amada, Terry Sanders Jr., and Michel Ninorich join the 08th MS Team of the Kojima Battalion.
(08th MS Team episode 2)
* Source: Sunrise Art Works: The 08th MS Team.

The Principality's Wolf Gar team discovers a temporary Federation Forces supply base in the Gobi Desert, and plans a surprise attack.
(Cross Dimension 0079)
* Source: Mobile Suit Gundam: Gihren's Greed The Complete.

U.C. 0079.10.09

The Federation Forces launch a Silk Road counteroffensive operation, codenamed Desert Dragon.
(Cross Dimension 0079)
* Source: The Gundam Chronicles Ver.2.

The Principality's Wolf Gar team attacks a Federation Forces supply base in the Gobi Desert. Both the Wolf Gar team and the Federation mobile suit forces are wiped out, but the Albatross transport company escapes.
(Cross Dimension 0079)
* Source: Mobile Suit Gundam: Gihren's Greed The Complete.

U.C. 0079.10.10

The Principality of Zeon completes the submarine carrier Mad Angler.
* Source: The Encyclopedia of Gundam.

The White Base enters the Tarim Basin in Central Asia. Its crew receive orders to cross the Caspian Sea within five days.
(Mobile Suit Gundam episode 16)
* Source: Gundam Officials. See footnote 8: The Death of Ramba Ral.

18:00   The Federation's 3rd Army, commanded by General Revil, departs from the Southampton base in Britain.
* Source: Entertainment Bible 39.

U.C. 0079.10.11

02:50   General Revil's forces cross the Strait of Dover. The Federation Forces begin their advance toward Odessa.
* Source: Entertainment Bible 39.

The White Base battles Ramba Ral's forces in the Taklamakan Desert.
(Mobile Suit Gundam episode 16)
* Although Gundam Officials places this event on October 10, the animation indicates that this is the day after the White Base receives its new orders. In the Gundam II movie continuity, the White Base has already crossed the Tien Shan mountain range at this point, and the battle takes place in the Kyzyl Kum Desert in modern Uzbekistan.

U.C. 0079.10.12

The Federation Forces send two naval fleets southward from Oslo, Norway to divert the Principality's submarine fleets.
* Source: Entertainment Bible 39.

The White Base attacks a Principality mining base in Central Asia. Amuro Ray deserts the Federation Forces, taking the RX-78 Gundam with him.
(Mobile Suit Gundam episode 17)
* Source: The Zeon News.

U.C. 0079.10.13

Amuro Ray's RX-78 Gundam attacks a Principality mining base in Central Asia, near Tashkent, and battles the mobile armor MAX-03 Adzam.
(Mobile Suit Gundam episode 18)
* The Zeon News and Gundam Fact File 136 claim that this takes place on November 3, two days before Ramba Ral's death, and I've moved it forward along with that event. See footnote 8: The Death of Ramba Ral.

Ramba Ral's team detects the White Base near the town of Sodon. Ramba Ral's MS-07 Gouf is destroyed in battle.
(Mobile Suit Gundam episode 19)
* The Zeon News claims that this takes place on the same day as the previous event. See footnote 8: The Death of Ramba Ral.

U.C. 0079.10.15

Arriving at the west shore of the Caspian Sea, the White Base is attacked by Ramba Ral's team. Ramba Ral is killed in action.
(Mobile Suit Gundam episode 20)
* While Entertainment Bible 39 and Gundam Officials place this event on November 5, I've moved it forward to accommodate the events of episodes 21-24 of the television series. See footnote 8: The Death of Ramba Ral.

U.C. 0079.10.20

The Federation's ground forces arrive at their assembly point in Warsaw, Poland, and establish a field headquarters.
* Source: Entertainment Bible 39.

U.C. 0079.10 (LATE)

The Principality's Caracal Corps performs combat testing of the YMS-09D Dom Tropical Test Type in northern Africa.
* Source: The Gundam Chronicles Ver.2. According to Mobile Suit Variation 2, this takes place just before Operation Odessa.

M'Quve orders the Midnight Fenrir corps to carry out a reconnaisance mission against the White Base.
(Zeonic Front)
* Source: Zeonic Front: Mobile Suit Gundam 0079 Complete Guide.

The White Base sustains damage to its engines and is forced to land on the coast of the Black Sea.
(Mobile Suit Gundam episode 22)
* According to episode 23 of the television series, General Revil receives the White Base's request for assistance as he arrives at the European frontline headquarters. The animation also suggests that some time passes between the immobilization of the White Base and the arrival of Matilda Ajan's supply corps, since General Revil apologizes for the delay in sending supplies. I'm thus fairly certain that this event takes place between October 20 and October 31.

U.C. 0079.10.24

The Principality announces the development of the EMS-10 Zudah.
(MS Igloo: The Hidden One Year War episode 3)
* The date is specified in the episode itself. On the same day, a Zudah test team rescues a Principality transport squadron from the Federation Forces.

U.C. 0079.10.25

The Federation Forces confirm the final details of Operation Odessa. Decoy forces are dispatched to various points to camouflage the attack target.
* Source: Entertainment Bible 39. This is presumably the point at which the Lost War Chronicles video game begins.

U.C. 0079.10.30

Char Aznable takes command of the Mad Angler submarine fleet.
* Source: Entertainment Bible 39.

U.C. 0079.11

The Principality of Zeon begins the mass production and deployment of mobile armors.
* Source: Newtype magazine, November 1988.

The Principality of Zeon completes a prototype version of the MP-02A Oggo.
* Source: MS Igloo Complete Setting Materials Collection.

U.C. 0079.11 (EARLY)

The Principality of Zeon converts the MS-09 Dom production lines at Granada to the MS-09R Rick Dom.
* Source: Master Grade MS-09R Rick Dom manual. Since the Rick Dom has already begun deployment, this presumably marks the end of Dom production at Granada, rather than the beginning of Rick Dom production. See footnote 6: MS-09 Dom Series.

The Federation Forces roll out the first unit of the Fellow Booster, a support device for the RGM-79 GM series.
* Source: Gundam Ace 090.

U.C. 0079.11.02

Federation forces participating in Operation Odessa receive air reinforcements.
* Source: Entertainment Bible 39. This may be an oblique reference to the deployment of the G-Fighter and the Core Booster, worded vaguely enough to apply to both the television series and the movie continuity.

Matilda Ajan's supply corps is dispatched to help repair the White Base's engines. The G-Fighter is deployed in combat.
(Mobile Suit Gundam episode 23)
* Source: Data Collection 6.

U.C. 0079.11.04

The 08th MS Team begins surveillance of a Principality testing ground.
(08th MS Team episode 6)
* Source: Sunrise Art Works: The 08th MS Team.

U.C. 0079.11.06

The Black Tri-Stars arrive at Odessa to support the Principality forces.
(Mobile Suit Gundam episode 24)
* Source: Entertainment Bible 39.

U.C. 0079.11.07

The Principality of Zeon sends two submarine fleets northward to divert the Federation Forces deployed for Operation Odessa.
* Source: Gundam Officials.

04:00   The Black Tri-Stars attack the White Base. Matilda Ajan's supply corps completes its repairs and the ship returns to the air.
(Mobile Suit Gundam episode 24)
* Source: Gundam Officials.

06:00   The Federation Forces launch Operation Odessa. The Federation's forces begin their advance and begin deploying aircraft.
* Source: Entertainment Bible 39.

13:40   The Federation's 3rd Army, commanded by General Revil, breaks through the Principality of Zeon's first defensive line. The Principality forces retreat, contracting their defense lines.
* Source: Entertainment Bible 39.

20:00   The Principality forces launch a counterattack against the Federation's 3rd Army.
* Source: Entertainment Bible 39.

U.C. 0079.11.08

Operation Odessa reaches a stalemate, as the Federation Forces find themselves unable to break through the Principality's contracted defense lines and concentrated forces.
* Source: Entertainment Bible 39.

A Principality test corps battles a Federation patrol squadron in the Corregidor shoal zone, destroying two space cruisers, four mobile suits, and four mobile pods.
* Source: Master Grade Mobile Pod Ball Ver.Ka manual. The details of the Federation losses are from the Zeon Military File, which also notes that the Principality test corps includes an MS-06Z Psycommu System Zaku team based aboard the test ship Lemuria.

U.C. 0079.11.09

The 08th MS Team battles a Principality of Zeon mobile armor, which escapes in the direction of the Himalaya Mountains.
(08th MS Team episode 6)
* Source: Sunrise Art Works: The 08th MS Team.

The Principality's 603rd Technical Evaluation Unit performs a final evaluation of the Zudah.
(MS Igloo: The Hidden One Year War episode 3)
* The date is specified in the episode itself.

Operation Odessa ends in victory for the Federation Forces. From Europe through Asia, the Principality of Zeon's fighting power begins to collapse.
(Mobile Suit Gundam episode 25)

03:35   The Federation's 4th Army breaks through the Principality's defensive lines and advances without encountering serious resistance.
* Source: Entertainment Bible 39. This would presumably be the army previously commanded by the traitor General Elran. After the general's treachery is exposed, his forces advance through a poorly defended area of the enemy lines.

05:00   The Federation Forces begin an offensive around the opening created by the 4th Army.
* Source: Entertainment Bible 39.

06:30   The White Base attacks the Principality's mining base from the rear.
* Source: Gundam Officials.

11:00   The Principality's defensive lines contract once again. The Federation's 3rd Army arrives at Kishinev, to the east of the Carpathian Mountains.
* Source: Entertainment Bible 39.

The Midnight Fenrir corps attack a Federation artillery force advancing toward Odessa.
(Zeonic Front)
* Source: Zeonic Front: Mobile Suit Gundam 0079 Complete Guide. This mission takes place while the White Base is battling the Black Tri-Stars.

17:00   M'Quve, commander of the Principality forces, abandons Odessa and escapes to space aboard a Zanzibar-class mobile cruiser.
* Source: Entertainment Bible 39.

The Principality's 603rd Technical Evaluation Unit descends to Earth orbit to assist Principality forces escaping from Odessa.
(MS Igloo: The Hidden One Year War episode 3)
* Source: HG Universal Century EMS-10 Zudah manual. The Federation Forces lose a total of six mobile suits and four mobile pods in this engagement.

U.C. 0079.11.10

The Federation Forces hold a naval review. They do not publicly announce that they now have mobile suits.

The Principality of Zeon begins combat deployment of the mobile armor MA-05 Bigro.
* Source: Newtype magazine, August 1987.

Shiro Amada is retrieved from the Himalaya Mountains.
(08th MS Team episode 7)
* Source: Sunrise Art Works: The 08th MS Team. This event takes place just after dawn.

14:00   The Federation Forces at Odessa go from combat status to alert status. Mopping-up operations begin.
* Source: Entertainment Bible 39.

The Principality of Zeon officially announces its abandonment of the Odessa mining region.
(MS Igloo: The Hidden One Year War episode 3)
* The date is specified in the episode itself. According to The Zeon News, this announcement is made at the end of the day.

The Red Dolphin submarine fleet launches a Mediterranean landing operation to aid the Principality forces escaping from Eastern Europe to Africa. After the Red Dolphin fleet is destroyed by a Federation Forces anti-submarine attack force, the Principality forces left in Eastern Europe head east toward the Baikonur spaceport.
* Source: The Secrets of Mobile Suit Development. Gundam Officials specifies the date only as mid-November.

U.C. 0079.11 (MID)

The Principality forces begin their withdrawal from Odessa. En route to a submarine rendezvous point, the Midnight Fenrir corps rescue a Dobday that has been immobilized by a Federation Forces attack.
(Zeonic Front)
* Source: Zeonic Front: Mobile Suit Gundam 0079 Complete Guide.

The 11th Autonomous Mechanized Composite Corps stages a night raid on a Zeon base and battles the RX-79BD-1 Blue Destiny.
(The Blue Destiny)
* Source: The Gundam Chronicles Ver.2. This battle takes place in Europe following the completion of Operation Odessa. See footnote 9: The Blue Destiny.

The Federation Forces launch an operation to recapture the Suez Canal.
* Source: Gundam Officials.

U.C. 0079.11.11

The Principality of Zeon completes the first prototype unit of the mobile armor MA-08 Big Zam.
* Source: Newtype magazine, August 1987.

U.C. 0079.11.12

Oliver May of the 603rd Technical Evaluation Unit completes his report on the Zudah.
(MS Igloo: The Hidden One Year War episode 3)
* Source: MS Igloo: 603rd Technical Evaluation Unit Interim Report.

U.C. 0079.11.16

The Principality of Zeon completes the mobile armor MAN-03 Braw Bro.
* Source: Newtype magazine, August 1987.

U.C. 0079.11.18

The Principality's Mad Angler submarine fleet, commanded by Char Aznable, detects the presence of the White Base at the Federation's Belfast base.
(Mobile Suit Gundam episode 26)
* Source: Entertainment Bible 39.

U.C. 0079.11.19

The Principality's 26th Submarine Squadron dispatches two amphibious mobile suits to attack Belfast.
(Mobile Suit Gundam episode 26)
* Source: Entertainment Bible 39. This attack is said to take place shortly after 11:00.

U.C. 0079.11.20

The Federation Forces carry out an inquiry regarding Shiro Amada's conduct.
(08th MS Team)
* Source: Sunrise Art Works: The 08th MS Team.

U.C. 0079.11 (LATE)

The Federation Forces begin combat deployment of the RGM-79 GM.
* Source: Gundam Officials. MS ERA 0099 claims that deployment begins on November 20, but the most recent sources are less specific.

The Principality of Zeon begins production of beam weapons for the MS-14 Gelgoog.
* Source: Master Grade MS-14S Char's Gelgoog manual.

The Midnight Fenrir corps join with other Principality forces retreating from Odessa and act as decoys to cover their escape.
(Zeonic Front)
* Source: Zeonic Front: Mobile Suit Gundam 0079 Complete Guide.

U.C. 0079.11.21

17:00   The Principality's 26th Submarine Squadron again attacks Belfast with amphibious mobile suits. Spy 107 takes advantage of the confusion to board the White Base.
(Mobile Suit Gundam episode 27)
* Source: Entertainment Bible 39.

U.C. 0079.11.22

01:38   The White Base departs for Jaburo.
(Mobile Suit Gundam episode 27)
* Source: Entertainment Bible 39.

The Mad Angler begins its pursuit of the White Base.
* Source: Entertainment Bible 39.

The Federation Forces launch a major offensive in Australia.
(Rise from the Ashes)
* Source: Gundam Side Story 0079: Rise From The Ashes novelization. The Federation's Australian forces are divided into three groups. Green Echidna heads north toward Darwin, Yellow Quokka heads south toward Adelaide, and Red Possum is sent to capture Alice Springs, the center of the Principality forces' rail network.

U.C. 0079.11.23

05:20   The Federation's White Dingo team engages Principality forces in Australia's Rainbow Valley.
(Rise from the Ashes)

U.C. 0079.11.24

05:00   Flanagan Boone of the 26th Submarine Squadron contacts Spy 107 and learns the White Base's destination.
(Mobile Suit Gundam episode 28)
* Source: Gundam Officials.

The Mad Angler attacks a Federation Forces anti-submarine attack force, sinking a Himalaya-class aircraft carrier.
(Mobile Suit Gundam episode 28)
* Source: Entertainment Bible 39.

Flanagan Boone uses a mobile armor and two amphibious mobile suits to attack the White Base as it crosses the Atlantic Ocean.
(Mobile Suit Gundam episode 28)
* Source: Gundam Officials.

U.C. 0079.11.25

11:30   The White Dingo team enters the occupied city of Alice Springs and negotiates the withdrawal of the Principality forces.
(Rise from the Ashes)
* After taking control of Alice Springs, the Red Possum force splits in two. One force heads north to support Green Echidna, the other south to support Yellow Quokka.

U.C. 0079.11.26

The African front expands as the Federation Forces launch a major offensive.
* Source: MS ERA 0099.

The Principality of Zeon adopts a new designation for its Newtype mobile suits and mobile armors. The new mobile suit which is being developed under the model number MS-16X is reclassified as the MSN-02 Zeong.
* Source: Zeon Military File.

U.C. 0079.11.27

The White Base arrives at the Federation Forces' Jaburo headquarters. The Mad Angler discovers the entrance to Jaburo's spacecraft docks, and Char Aznable contacts the California Base to request reinforcements for an attack on Jaburo.
(Mobile Suit Gundam episode 29)
* Source: Entertainment Bible 39.

U.C. 0079.11.28

The Mad Angler withdraws to the mouth of the Amazon River. The California Base begins preparations for an attack on Jaburo.
* Source: Entertainment Bible 39.

U.C. 0079.11.29

You Kajima of the 11th Autonomous Mechanized Composite Corps is assigned to pilot the Blue Destiny.
(The Blue Destiny)
* Source: HG Universal Century RX-79BD-3 Blue Destiny Unit 3 manual. See footnote 9: The Blue Destiny.

U.C. 0079.11.30

The Principality of Zeon launches an airborne assault on Jaburo, the Federation Forces headquarters in South America.
(Mobile Suit Gundam episode 29)

03:20   The Mad Angler dispatches an advance team of amphibious mobile suits up the Amazon River to search for entrances into Jaburo.
* Source: Entertainment Bible 39.

05:40   The advance team discovers Jaburo's entrances. The Federation Forces detect the advance team and issue an alert.
* Source: Entertainment Bible 39.

06:30   A formation of Gaw attack carriers appears over Jaburo and begins deploying mobile suits. The Federation Forces go to combat status and launch interceptor aircraft.
* Source: Entertainment Bible 39.

07:30   After landing, the Principality mobile suits form small teams and begin searching for entry routes into Jaburo.
* Source: Entertainment Bible 39.

07:40   Char Aznable joins the advance team of amphibious mobile suits.
* Source: Entertainment Bible 39.

07:50   Char Aznable engages Amuro Ray's RX-78 Gundam in combat.
* Source: Entertainment Bible 39.

08:30   Having lost half its fighting strength, the Principality mobile suit force begins withdrawing.
* Source: Entertainment Bible 39.

09:00   The Principality forces complete their withdrawal from Jaburo. They are attacked by Federation pursuit forces.
* Source: Entertainment Bible 39.

U.C. 0079.12

The Principality of Zeon forms an elite Ace Corps, with the Zanzibar-class mobile cruiser Chimaira as its flagship, to test the YMS-14 Gelgoog.
* Source: Gundam Ace 087. The Zeon Military File says the Ace Corps departs for the Corregidor shoal zone on October 26 to begin its training mission, but I think this is superseded by the newer date from the MSV-R series. According to Gundam Officials, it's claimed that the Ace Corps encounters several Federation patrols during this training mission, destroying three space battleships and eight space cruisers.

U.C. 0079.12 (EARLY)

The Federation Forces recapture the California Base.
* See footnote 10: Recapture of the California Base.

The Principality's 604th Technical Evaluation Unit begins an evaluation of the MSM-07Di Ze'Gok.
(MS Igloo: Apocalypse 0079 episode 1)
* Source: MS Igloo Complete Setting Materials Collection.

U.C. 0079.12.01

14:07   The White Dingo team intercepts a Gaw attack carrier at Simpson's Gap.
(Rise from the Ashes)

U.C. 0079.12.03

The Principality's 603rd Technical Evaluation Unit continues the evaluation of the Ze'Gok.
(MS Igloo: Apocalypse 0079 episode 1)
* Source: MS Igloo Complete Setting Materials Collection.

U.C. 0079.12.04

The Midnight Fenrir corps are deployed in North America to slow the advance of the Federation Forces.
(Zeonic Front)
* Source: The Gundam Chronicles Ver.2. This mission takes place on the final defense lines of the California Base. See footnote 10: Recapture of the California Base.

You Kajima of the 11th Autonomous Mechanized Composite Corps uses the Blue Destiny to attack an enemy missile base near the California Base.
(The Blue Destiny)
* Source: Gundam Ace 093. This event comes just before the main assault on the California Base, and the MS Boys comic specifies that it takes place on the night of December 4. You Kajima goes on to join the main battle, and the Blue Destiny is heavily damaged in combat with Principality ace pilot Nimbus Schterzen. See footnote 9: The Blue Destiny.

U.C. 0079.12.05

The Federation Forces complete their recapture of the Suez Canal, and begin mopping-up operations in Africa and North America.
* These mopping-up operations continue until December 15. The completion of the Suez Canal operation is as per Gundam Officials. See footnote 10: Recapture of the California Base.

11:00   The Federation Forces launch a mopping-up operation at the California Base.
* According to the Blue Destiny novelization, the outcome of the battle is determined by the first evening, although the fighting continues for at least three more days. See footnote 10: Recapture of the California Base.

The Midnight Fenrir corps protect friendly forces from the California Base as they escape into space.
(Zeonic Front)
* Source: The Gundam Chronicles Ver.2. This mission takes place as the Principality forces are withdrawing from the California Base. See footnote 10: Recapture of the California Base.

U.C. 0079.12.06

The Principality's Cyclops special forces team descends to Earth to capture the RX-78NT-1 Gundam. The Cyclops team joins with Principality forces on Earth and prepares to attack a Federation Forces base in the Arctic Circle.
(Gundam 0080)
* Source: Gundam Officials.

U.C. 0079.12.07

The Federation Forces lay siege to a Principality base on the Tibetan Plateau.
(08th MS Team episode 10)
* Source: Master Grade MS-07B-3 Gouf Custom manual.

The Principality's 603rd Technical Evaluation Unit performs a final evaluation of the Ze'Gok.
(MS Igloo: Apocalypse 0079 episode 1)
* Source: MS Igloo Complete Setting Materials Collection. The Ze'Gok destroys one Federation space battleship and four space cruisers as they launch from Jaburo.

U.C. 0079.12.08

The Principality of Zeon begins combat deployment of the MS-14 Gelgoog.
* Source: MS ERA 0099.

18:00   The Cyclops team departs from the Novaya Zemlya base aboard a Jukon-class submarine.
(Gundam 0080)
* Source: Gundam Officials.

U.C. 0079.12.09

15:00   The Cyclops team attacks the Federation's arctic base. The shuttle carrying the RX-78NT-1 Gundam escapes into space.
(Gundam 0080 episode 1)
* Source: Gundam Officials.

15:25   The Cyclops team withdraws from the arctic base.
* Source: Gundam Officials.

U.C. 0079.12 (MID)

The 11th Autonomous Mechanized Composite Corps pursues the stolen RX-79BD-2 Blue Destiny to an abandoned space colony at the former Side 5.
(The Blue Destiny)
* Source: The Gundam Chronicles Ver.2. See footnote 9: The Blue Destiny.

U.C. 0079.12.11

The Cyclops team returns to Granada.
* Source: Gundam Officials.

The shuttle carrying the RX-78NT-1 Gundam arrives at Side 6's Libot colony. The Gundam is secretly transferred to a Federation medical center.
(Gundam 0080 episode 1)
* Gundam Officials and the DVD liner notes claim that this takes place on December 12, but I've moved it forward one day. See footnote 11: Operation Rubicon.

The Principality's 603rd Technical Evaluation Unit begins an evaluation of the GM Camouf.
(MS Igloo 603)
* Source: MS Igloo Complete Setting Materials Collection.

U.C. 0079.12.12

Principality forces from Granada attack Side 6's Libot colony and battle the Federation Forces garrison. Alfred Izuruha meets Bernard Wiseman.
(Gundam 0080 episode 1)
* Gundam Officials and the DVD liner notes claim that this takes place on December 13, but I've moved it forward one day. See footnote 11: Operation Rubicon.

The Principality's 18th Supply Base in Tanzania is attacked and destroyed by friendly forces.
(Burning Pursuit)
* Source: The Gundam Chronicles Ver.2. The attack is carried out by ace pilot Frederick Cranberry and his Iron Scorpion corps. A mechanic named John Quest is among the only survivors.

A Principality warship squadron is attacked by an unknown Federation weapon in the Side 4 shoal zone.
(MS Igloo 603)
* Source: Gundam Ace 039.

U.C. 0079.12.13

Federation amphibious forces land on the eastern coast of Africa.
* First mentioned in a character profile in Entertainment Bible 39, this event also appears in the timeline published in Gundam Officials.

15:30   Bernard Wiseman is assigned to the Cyclops team.
(Gundam 0080 episode 2)
* The time is specified in the episode's dialogue.

23:00   The Principality of Zeon launches Operation Rubicon. The Cyclops team departs from Granada.
(Gundam 0080 episode 2)
* Gundam Officials and the DVD liner notes claim that this takes place on December 14, but I've pushed it forward one day to allow time for the journey to Side 6. See footnote 11: Operation Rubicon.

23:00   Four warships, including the White Base, launch from Jaburo to divert the Principality forces. Each ship takes a different course. (Local time is 19:00.)
(Mobile Suit Gundam episode 31)
* Source: Master Grade MS-09R Rick Dom manual. The local time is specified in the episode's dialogue. Although there's no information as to the identity of the other ships, they could perhaps be other vessels of the Pegasus class. See footnote 12: Departure From Jaburo.

U.C. 0079.12.14

The White Base battles the Principality's Kamel Squadron in Earth orbit.
(Mobile Suit Gundam episode 32)
* Source: Master Grade MS-09R Rick Dom manual.

01:00   The Federation Forces begin their space offensive. A Federation fleet commanded by Admiral Tianem launches from Jaburo. (Local time is 21:00 on December 13.)
* Source: Data Collection 2. The local time is specified in the episode's dialogue. According to Entertainment Bible 39, more than 20 Magellan-class battleships and 60 Salamis-class cruisers are launched into orbit at this point. See footnote 12: Departure From Jaburo.

Oliver May of the 603rd Technical Evaluation Unit completes his report on the GM Camouf.
(MS Igloo 603)
* Source: Gundam Ace 033. The date is specified in the story itself.

U.C. 0079.12.15

06:00   Principality forces from Granada launch a second attack on Side 6's Libot colony. The Cyclops team smuggles a mobile suit into the colony during the battle.
(Gundam 0080 episode 2)
* Source: Gundam Officials.

U.C. 0079.12.16

Alfred Izuruha and Bernard Wiseman infiltrate a secret Federation Forces base.
(Gundam 0080 episode 3)
* Source: DVD liner notes.

John Quest defeats the Iron Scorpion corps at the Gedo fortress.
(Burning Pursuit)
* Source: The Gundam Chronicles Ver.2.

The Principality of Zeon completes the prototype mobile armor MAN-08 Elmeth.
* Source: Newtype magazine, August 1987.

U.C. 0079.12.17

Side 6's foreign ministry orders all Principality of Zeon vessels to leave its airspace.
(Gundam 0080 episode 4)
* Source: Gundam Officials. Perhaps Char's Zanzibar, which docks at Side 6 in episode 34 of the television series and remains there until after the Battle of Solomon begins, has a special exemption.

U.C. 0079.12.18

10:15   The White Dingo team engages Principality forces at the Carrieton opencut mine.
(Rise from the Ashes)

U.C. 0079.12.19

The White Base battles the Conscon Squadron near Side 6.
(Mobile Suit Gundam episode 34)
* Source: Master Grade MS-09R Rick Dom manual.

18:00   A Cyclops team mobile suit launches a diversionary attack on Side 6's Libot colony. Meanwhile, the team's other members infiltrate the secret Federation Forces base that houses the RX-78NT-1 Gundam.
(Gundam 0080 episode 4)
* Source: Gundam Officials. According to the colony's police, 246 people are killed and 572 injured during this mobile suit battle.

U.C. 0079.12.20

The last survivor of the Cyclops team contacts a Principality spy at Side 6's Libot colony. He learns that Commander Killing plans to attack the colony with nuclear weapons.
(Gundam 0080 episode 5)
* Source: Gundam Officials.

The Principality's 603rd Technical Evaluation Unit performs an evaluation of the YOP-04 Balor.
(MS Igloo 603)
* Source: MS Igloo Complete Setting Materials Collection.

U.C. 0079.12.21

The White Base arrives at the former Side 5 to rendezvous with the Federation's 3rd Fleet.
* Source: Master Grade MS-09R Rick Dom manual. This is when the Texas Colony battle of the Gundam III movie would take place.

U.C. 0079.12.23

09:42   The White Dingo team discovers a Principality submarine base in the abandoned city of Adelaide.
(Rise from the Ashes)

U.C. 0079.12.24

The Federation Forces launch an attack on the asteroid fortress Solomon, headquarters of the Principality's Space Attack Force.
(Mobile Suit Gundam episode 35)

18:10   After approaching Solomon via the remains of Side 4, the Federation's 3rd Fleet launches assault boats to create a beam-diffusing screen.
* Source: Entertainment Bible 39.

18:35   Captain Wakkein, commander of the Federation's 3rd Fleet, orders its ships to launch their mobile suit forces.
* Source: Entertainment Bible 39.

18:50   The Federation's Tianem Fleet, concealed by the remains of Side 1, completes the deployment of its Solar System weapon. The Solar System is focused on Solomon's 6th Gate.
* Source: Entertainment Bible 39.

19:10   The Tianem Fleet approaches Solomon.
* Entertainment Bible 39 claims that the Tianem Fleet also launches its mobile suits at this point. According to the animation, however, the fleet doesn't launch its own mobile suits until Admiral Tianem receives word of the Gundam's entry into Solomon, which happens an hour later.

19:30   Dozle Zabi orders the remaining Principality mobile suit forces to retreat to Solomon.
* Entertainment Bible 39 claims that Dozle sorties in the Big Zam at this point. According to the animation, however, Dozle doesn't board the Big Zam until after Federation mobile suits have reached Solomon.

20:20   Federation mobile suit forces enter Solomon.
* Source: Entertainment Bible 39.

20:25   The Principality of Zeon dispatches a fleet from Granada to aid Solomon.
* Source: Entertainment Bible 39. Based on the usual travel times, it seems unlikely that this fleet could ever have reached Solomon in time.

20:40   Dozle orders the Principality forces to abandon Solomon. He begins a direct attack on the Tianem Fleet, using the mobile armor MA-08 Big Zam.
* Source: Entertainment Bible 39.

20:55   The Big Zam destroys the Magellan-class battleship Titan, flagship of the Tianem Fleet.
* Source: Entertainment Bible 39.

21:15   The Big Zam is destroyed, and Dozle Zabi is killed. The remaining Principality forces complete their withdrawal from Solomon.
* Source: Entertainment Bible 39.

U.C. 0079.12.25

The Federation Forces complete their mopping-up operations and occupy Solomon. The asteroid fortress is renamed Konpeitoh.
* Source: Entertainment Bible 39.

The Principality of Zeon completes the preparation of the Solar Ray system.
* Source: Gundam Officials. This is presumably derived from episode 40 of the Mobile Suit Gundam television series, which states that the Mahar colony was evacuated four days earlier.

The White Dingo team is assigned to pursue the Principality special forces team carrying the Astaroth samples.
(Rise from the Ashes)
* Source: Gundam Side Story 0079: Rise From The Ashes novelization.

00:00   The Principality of Zeon dispatches a squadron from Granada to attack Side 6's Libot colony.
* Source: Gundam Officials.

10:55   The Federation Forces intercept a Principality squadron en route to Side 6.
* Source: Gundam Officials.

14:00   The last member of the Cyclops team attempts to destroy the RX-78NT-1 Gundam, in order to prevent the annihilation of the Libot colony.
(Gundam 0080 episode 6)
* Source: Gundam Officials.

15:28   The White Dingo team attacks a Principality mining base near Broken Hill.
(Rise from the Ashes)

U.C. 0079.12.26

The White Base enters the former Side 5 in pursuit of fleeing Principality forces. A battle begins in and around the Texas colony.
(Mobile Suit Gundam episode 37)
* This is my own estimate, allowing the White Base a day to travel each way between Solomon and Side 5. The Mobile Suit Gundam Official Web site, however, places this event on December 25.

The 16th Autonomous Squadron engages an enemy fleet in a shoal zone near the moon. The RX-78-4 Gundam is destroyed in battle.
(Space, After the Flash)
* Source: Gundam Side Story: Space, After The Flash comic.

18:04   The Principality of Zeon launches simultaneous attacks on the Federation Forces' Torrington and Charleville bases in Australia.
(Rise from the Ashes)
* The White Dingo team assists in the defense of the Torrington base. According to the Gundam Side Story 0079: Rise From The Ashes novelization, Principality ace pilot Visch Donahue participates in the attack on Charleville.

The Principality's Australian forces begin the evacuation plan codenamed Staircase to the Moon.
(Rise from the Ashes)
* Although the Federation Forces assume that the enemy plan is to escape to space via the Hughenden HLV base in eastern Australia, the Principality forces in fact intend to make their way to the west coast of Australia and escape to Africa.

U.C. 0079.12.27

General Revil arrives at Konpeitoh. The Principality's Autonomous 300th Squadron carries out a long-range attack on the asteroid fortress.
(Mobile Suit Gundam episode 39)
* Gundam Officials claims that this takes place on December 25, but that would leave no time for the White Base's adventures at Texas Colony. The animation also indicates that it happens shortly before the Braw Bro's sortie.

The Federation Forces' "Immortal 4th Team" is equipped with the RGM-79C GM.
* Source: Master Grade RGM-79C GM manual.

U.C. 0079.12.28

The White Base battles the mobile armor MAN-03 Braw Bro.
(Mobile Suit Gundam episode 39)
* According to the animation, this happens the day before the events of episode 40.

The Principality determines that the next target of the Federation Forces is the space fortress A Baoa Qu. The 603rd Technical Evaluation Unit is ordered to join the defense of A Baoa Qu.
(MS Igloo: Apocalypse 0079 episode 2)
* The date is specified in the story itself. The test support ship Jotunheim is assigned to a combat battalion under the command of Herbert Von Kuspen.

U.C. 0079.12.29

The magnet coating process is applied to Amuro Ray's RX-78 Gundam.
(Mobile Suit Gundam episode 40)
* The Master Grade RX-78-2 Gundam manual claims that this is done on December 27, but the animation indicates that it happens around the time the Revil Fleet departs Solomon.

The Principality's 300th Squadron engages a Federation patrol squadron. The mobile armor MAN-08 Elmeth destroys two Federation space cruisers.
(Mobile Suit Gundam episode 40)
* This event takes place before the Revil Fleet leaves Konpeitoh, and the episode states that it happens on the same day as the Elmeth's next sortie.

The Federation Forces launch Operation Star One, whose target is the space fortress A Baoa Qu and the Principality of Zeon's homeland of Side 3. A Federation fleet commanded by General Revil departs from Konpeitoh.
(Mobile Suit Gundam episode 40)

The Principality's 300th Squadron joins a force commanded by Kycilia Zabi, which then engages the Federation's 13th Autonomous Fleet. The Elmeth destroys two more Federation space cruisers.
(Mobile Suit Gundam episode 40)
* This event takes place after the Revil Fleet leaves Konpeitoh, and the episode states that it happens on the same day as the Elmeth's previous sortie.

U.C. 0079.12.30

The 603rd Technical Evaluation Unit is dispatched to the Granada lunar base to intercept Federation Forces decoy fleets.
(MS Igloo: Apocalypse 0079 episode 2)
* The date is specified in the story itself. The Federation Forces lose two space cruisers and six mobile pods in this engagement.

The Principality's Ace Corps attacks a Federation fleet headed for A Baoa Qu, destroying two space cruisers, one transport ship, 14 mobile suits and 22 space fighters.
* Source: Mobile Suit Variation 2. See footnote 13: Operation Clarion.

Kycilia Zabi's forces again attack the Federation's 13th Autonomous Fleet. The Elmeth is destroyed.
(Mobile Suit Gundam episode 41)
* This takes place just before the activation of the Solar Ray.

20:20   The Phoebe, flagship of the Federation's Revil Fleet, receives a transmission from the Principality battleship Great Degwin.
* Source: Gundam Officials.

21:00   The Great Degwin approaches the Phoebe.
* Source: Gundam Officials.

21:05   The Principality of Zeon activates the Solar Ray.
* Source: Gundam Officials.

The Principality's Solar Ray weapon destroys a third of the Federation fleet, along with General Revil and Sovereign Degwin Sodo Zabi.
(Mobile Suit Gundam episode 41)

U.C. 0079.12.31

The 603rd Technical Evaluation Unit receives the MA-05Ad Big Rang while en route to A Baoa Qu.
(MS Igloo: Apocalypse 0079 episode 3)
* The date is specified in the story itself. The Big Rang and the test support ship Jotunheim are stationed in A Baoa Qu's E Field, and the Big Rang destroys at least one space battleship and five space cruisers during the battle.

The Federation Forces attack the space fortress A Baoa Qu.
(Mobile Suit Gundam episode 42)

00:00   The Federation Forces decide to proceed with Operation Star One.
* Source: Entertainment Bible 39.

05:00   The Federation Forces complete the reorganization of their remaining fleet. The White Base is assigned to the 1st Battalion, commanded by the Magellan-class battleship Luzal.
* Source: Gundam Officials.

08:10   The Battle of A Baoa Qu begins. The Federation's 2nd and 3rd Battalions enter A Baoa Qu's N Field and launch a first wave of assault boats.
* Source: Entertainment Bible 39. I've added the details of the Federation fleets and their direction of attack based on the animation.

08:40   The Federation's 2nd and 3rd Battalions launch their mobile suits.
* Source: Entertainment Bible 39.

09:00   The Federation's 1st Battalion enters A Baoa Qu's S Field. Kycilia Zabi dispatches Char Aznable and the 34th Mobile Suit Corps to intercept this Federation fleet.
* Source: Gundam Officials.

09:25   Gihren Zabi, commander in chief of the Principality forces, is assassinated inside A Baoa Qu's control room.
* Source: Entertainment Bible 39.

09:40   The Principality carrier Dolos is destroyed. Federation mobile suit forces begin entering A Baoa Qu.
* Source: Entertainment Bible 39.

10:10   The Principality carrier Doroa is destroyed.
* Source: Entertainment Bible 39.

11:00   Anticipating the Principality's defeat, Aiguille Delaz and his followers withdraw from the battlefield.
(Gundam 0083)
* Source: Gundam Officials.

12:05   Kycilia Zabi attempts to escape A Baoa Qu. Her Zanzibar-class mobile cruiser is destroyed by Federation warships.
* Source: Entertainment Bible 39.

18:00   The leaders of the re-established Republic of Zeon contact the Federation government to negotiate a peace agreement.
* Source: Entertainment Bible 39.

The Midnight Fenrir corps arrive in Africa and join the remaining Principality forces.
(Zeonic Front)
* Source: Zeonic Front: Mobile Suit Gundam 0079 Complete Guide.

U.C. 0080.01

Aiguille Delaz gathers the Principality forces which remain in the Earth Sphere and reorganizes his fleet.

U.C. 0080.01.01

15:00   The One Year War ends. The Earth Federation and the Republic of Zeon reach a peace agreement at the lunar city of Granada.
* Source: Entertainment Bible 39.

22:00   The Federation Forces attack the Principality's Hughenden fortress in Australia.
(Rise from the Ashes)
* Since 22:00 in eastern Australia is equivalent to 12:00 in standard time, this battle actually begins three hours before the peace agreement is announced. See footnote 7: Local Time.

U.C. 0080.01.02

06:23   The Federation Forces attack the Principality's Hughenden HLV base.
(Rise from the Ashes)
* The HLV containing the Astaroth sample is destroyed by the White Dingo team.

U.C. 0080.01.14

The Earth Federation and the government of Side 6 sign a security treaty.
(Gundam 0080 episode 6)

U.C. 0080.01.15

Former Principality forces gather at Karama Point, between the moon and Side 3, before departing for the asteroid base Axis.
(Gundam 0083)
* Source: Gundam Ace 009.

Federation special forces engage Principality remnants at the asteroid base Pezun.
* Source: Mobile Suit Gundam: Encounters in Space strategy guide.

U.C. 0080.02

The Earth Federation begins a postwar inquiry. The report establishes that the Gwazine-class space battleship Zwamel and more than ten Gelgoogs have gone missing from the Granada base.
* Source: The Encyclopedia of Gundam. This event was first mentioned in Mobile Suit Variation 2.

U.C. 0080.02.18

The Earth Federation and the Republic of Zeon approve the Treaty of Granada, formally concluding the One Year War. The treaty recognizes the independence of Side 3 and allows it to maintain its military forces.
* Source: Entertainment Bible 2.

U.C. 0080.03

Aiguille Delaz relocates his fleet to a shoal zone and begins construction of the Garden of Thorns. The Delaz Fleet temporarily halts its external activities.

Anaheim Electronics begins acquiring the Republic of Zeon's military industries, starting with the Zeonic company.
* Source: The Encyclopedia of Gundam.

U.C. 0080.06

The Federation Forces announce that the former Principality forces on the African front have now been disarmed.

U.C. 0081.03.14

The Buch Concern establishes a vocational training school.

U.C. 0081.03.28

Principality remnants arrive at the asteroid base Axis. With them is the infant Mineva Zabi, the Principality's heir.

U.C. 0081.04

The Federation Forces perform an annual update.
* Source: Master Grade RGM-79C GM manual. As a result of this update, roughly ten units of the RGM-79C GM are assigned to the Torrington base in Australia.

U.C. 0081.05.05

At Axis, Dozle Zabi's widow Zenna succumbs to an illness.

U.C. 0081.08.15

On the anniversary of the Principality of Zeon's foundation, the Delaz Fleet begins guerilla activities.

U.C. 0081.09.17

Anavel Gato returns to the Delaz Fleet.

U.C. 0081.10

The Earth Federation and the Republic of Zeon complete the repatriation of all prisoners of war.
* Source: The Encyclopedia of Gundam. This event was first mentioned in Mobile Suit Variation 2.

U.C. 0081.10.13

The Federation Assembly approves the Federation Forces Reconstruction Plan.

U.C. 0081.10.20

As part of the Federation Forces Reconstruction Plan, the civilian company Anaheim Electronics begins the top-secret Gundam Development Project under the supervision of John Kowen.

U.C. 0081.11

The Delaz Fleet and the Axis forces establish a cooperative relationship.

U.C. 0081.12.16

At Axis, Mineva Zabi is formally declared the heir to the Principality of Zeon.
(Char's Deleted Affair)
* Source: The Encyclopedia of Gundam. A Federation space fleet attacks Axis during the ceremony, but the operation ends in failure and the surrender of the Federation fleet.

U.C. 0081.12.19

An independence movement within the Republic of Zeon secretly contacts the Axis forces.
(Char's Deleted Affair)
* Source: The Encyclopedia of Gundam.

U.C. 0082.01

Captive Federation soldiers attempt to escape from Axis.
(Char's Deleted Affair)
* Source: The Encyclopedia of Gundam.

U.C. 0082.01.10

At Axis, Haman Karn is appointed as Mineva Zabi's attendant. Char Aznable is made a guard to the royal household.
(Char's Deleted Affair)
* Source: The Encyclopedia of Gundam.

U.C. 0082.02.11

The Axis Advance Fleet departs for the Earth Sphere to support the Delaz Fleet.
(Char's Deleted Affair)
* Source: The Encyclopedia of Gundam. This date is a year earlier than the one given in the story itself, but it allows for a more realistic travel time.

U.C. 0082.04

The Federation Forces secretly establish their own Newtype Labs.

U.C. 0082.05

The first Colony Reclamation Plan begins. Damaged space colonies are transferred from the former Side 4 to Side 3.

U.C. 0082.06

Anaheim Electronics acquires the aerospace company Hervic.
* Source: Master Grade RX-78GP01 Zephyranthes manual.

U.C. 0082.09

The Federation government introduces a system of identification numbers for spacenoids.
* Source: The Encyclopedia of Gundam.

U.C. 0082.12

The Delaz Fleet begins mobile suit development in its manufacturing plants at the Garden of Thorns.

U.C. 0083.01

The Delaz Fleet learns of the Gundam Development Project and places spies within Anaheim Electronics.

U.C. 0083.03

The Delaz Fleet plans a major resistance operation and strengthens its relations with other anti-Federation elements.

U.C. 0083.04

The Federation space battleship Birmingham enters service as the flagship of Luna II's 2nd Garrison Fleet.
* Source: Gundam 0083 novelization.

U.C. 0083.05

The Delaz Fleet begins production of the MS-21C Dra-C.

U.C. 0083.07.30

The Delaz Fleet drafts plans for Operation Stardust.

U.C. 0083.08.09

Axis leader Maharaja Karn dies.

U.C. 0083.08.11

Haman Karn succeeds her father as Mineva Zabi's regent.

U.C. 0083.09

The Axis forces succeed in developing the new alloy Gundarium Gamma.

Plans for Cima Garahau to join the Delaz Fleet are abandoned due to Anavel Gato's objections.

U.C. 0083.09.18

Rollout of the RX-78GP02A Gundam at Anaheim Electronics' Von Braun factory.

U.C. 0083.09.29

Rollout of the RX-78GP01 Gundam and its Full Vernian conversion parts at Anaheim Electronics' Von Braun factory.

U.C. 0083.10.04

Rollout of the RX-78GP03 Gundam at Anaheim Electronics' Von Braun factory.

U.C. 0083.10.07

The mobile assault carrier Albion collects the Gundam GP01 and Gundam GP02A from the Von Braun factory, then departs for the Federation Forces' Torrington base in Australia for ground testing.

U.C. 0083.10.09

Anavel Gato lands in Africa, joining forces with terrestrial remnants of the Principality of Zeon.

U.C. 0083.10.13

15:00   The Albion arrives at the Torrington base. Operation Stardust begins.
(Gundam 0083 episode 1)

20:50   Anavel Gato infiltrates the Torrington base with the help of Anaheim Electronics engineer Nick Orville.
(Gundam 0083 episode 1)
* Source: Gundam 0083 novelization. See footnote 14: Gundam 0083 Novelization.

21:05   Anavel Gato captures the Gundam GP02A and its nuclear warhead.
(Gundam 0083 episode 1)
* Source: Gundam 0083 novelization. The time is specified in the timeline at the beginning of the second novel.

21:46   A Federation mobile suit team led by South Burning sets off from the Torrington base to pursue the Gundam GP02A.
(Gundam 0083 episode 2)

U.C. 0083.10.14

00:50   Anavel Gato and the Gundam GP02A attempt to escape into space aboard a Komusai shuttle, but the launch is prevented by Kou Uraki's Gundam GP01.
(Gundam 0083 episode 2)
* Source: Gundam 0083 novelization. The time is specified in the timeline at the beginning of the second novel.

Anavel Gato engages the Federation's Kalent team.
(Gundam 0083 episode 2)
* According to the Gundam 0083 novelization, this skirmish takes between 05:30 and 5:50. See footnote 14: Gundam 0083 Novelization.

06:20   Anavel Gato and the Gundam GP02A are recovered by a Jukon-class submarine and escape in the direction of Africa.
(Gundam 0083 episode 2)
* Source: Gundam 0083 novelization. The time is specified in the timeline at the beginning of the second novel.

10:51   John Kowen orders the Albion to pursue the stolen Gundam GP02A. Three new pilots and five replacement mobile suits are assigned to the Albion.
* According to the Gundam 0083 novelization, the reinforcements arrive at approximately 12:40. See footnote 14: Gundam 0083 Novelization.

18:00   The Albion departs for Africa.
(Gundam 0083 episode 3)

U.C. 0083.10.16

The Albion arrives in Africa and begins searching for the stolen Gundam GP02A.
(Gundam 0083)

U.C. 0083.10.23

09:14   Anavel Gato and the Gundam GP02A arrive at the Principality's Kimberlite base in eastern Africa.
(Gundam 0083 episode 4)

Nick Orville is exposed as a spy and escapes from the Albion in a spare Core Fighter. A mobile suit team led by Bernard Monsha is dispatched in pursuit.
(Gundam 0083 episode 4)
* According to the Gundam 0083 novelization, Orville escapes at approximately 12:30 and Monsha's team begins its pursuit at about 13:10. See footnote 14: Gundam 0083 Novelization.

13:15   Neuen Bitter, the commander of the Kimberlite base, begins a decoy operation to divert the Albion.
(Gundam 0083 episode 4)

Mobile suits from the Kimberlite base shoot down Nick Orville's Core Fighter and then engage Bernard Monsha's team.
(Gundam 0083 episode 4)
* According to the Gundam 0083 novelization, these mobile suits shoot down Orville's Core Fighter at approximately 13:30 and are destroyed at about 13:40. See footnote 14: Gundam 0083 Novelization.

Neuen Bitter leads his remaining mobile suits in an attack on the Albion.
(Gundam 0083 episode 4)
* According to the Gundam 0083 novelization, this takes place at approximately 13:45. See footnote 14: Gundam 0083 Novelization.

14:01   Anavel Gato and the Gundam GP02A escape to space in a Heavy-lift Launch Vehicle (HLV).
(Gundam 0083 episode 4)

14:27   The Kimberlite base surrenders to the Federation Forces.
(Gundam 0083 episode 4)

14:30   Anavel Gato's HLV is recovered by the Musai-class space cruiser Peer Gynt.
(Gundam 0083 episode 5)

14:41   The Peer Gynt leaves Earth orbit after destroying a Federation Forces reconnaissance squadron.
(Gundam 0083 episode 5)
* Source: Gundam 0083 novelization. The time is specified in the timeline at the beginning of the second novel. According to the animation, the Peer Gynt and its escort destroy at least three Federation space cruisers in this battle.

U.C. 0083.10.25

Cima Garahau joins the Delaz Fleet.
(Gundam 0083)

08:50   The Albion completes resupply and departs for space in pursuit of the Gundam GP02A.
(Gundam 0083)
* Source: Gundam 0083 novelization. The time is specified in the timeline at the beginning of the second novel.

U.C. 0083.10.28

Trials of the Gundam GP03 begin at the Anaheim Electronics dock ship La Vie En Rose.
(Gundam 0083)

U.C. 0083.10.31

09:23   The Peer Gynt narrowly avoids a collision with the Zanzibar-class mobile cruiser Lili Marleen, the flagship of the Cima Fleet, as it travels through a shoal zone.
(Gundam 0083 episode 5)

10:37   The Peer Gynt returns to the Garden of Thorns.
(Gundam 0083 episode 5)

10:51   The Albion is joined by the Salamis-class space cruisers Nashville and Yulin, and begins searching the shoal zone.
(Gundam 0083 episode 5)

12:19   The Lili Marleen intercepts the Albion and its escorts.
(Gundam 0083 episode 5)
* The Albion's two escort ships are destroyed in this battle, and the Gundam GP01 is heavily damaged.

12:30   The Delaz Fleet's declaration of war is broadcast throughout the Earth Sphere.
(Gundam 0083 episode 5)

U.C. 0083.11.01

The second Colony Reclamation Plan begins. Two damaged space colonies are transferred from Side 1 to Side 3.

The Cima Fleet attacks La Vie En Rose in an attempt to capture the Gundam GP03.
(Gundam Evolve episode 4)

U.C. 0083.11.02

16:00   The Albion docks at the lunar city of Von Braun. The Gundam GP01 is transferred to Anaheim Electronics for repair and conversion to the Full Vernian type.
(Gundam 0083 episode 6)

U.C. 0083.11.03

08:09   A camouflaged Delaz Fleet ferry ship enters Von Braun's resource intake port.
(Gundam 0083 episode 6)

U.C. 0083.11.04

10:06   Trials of the Gundam GP01Fb begin at Anaheim Electronics' Livermore test site.
(Gundam 0083 episode 7)

Former Principality pilot Kelly Layzner reactivates the mobile armor Val Varo. As the Albion detects the enemy mobile armor, a camouflaged Delaz Fleet ferry ship deploys a single mobile suit to intercept the Val Varo.
(Gundam 0083 episode 7)
* According to the Gundam 0083 novelization, the Val Varo is activated at approximately 20:31 and the Albion detects it at about 20:45. See footnote 14: Gundam 0083 Novelization.

20:55   The Albion departs Von Braun.
(Gundam 0083 episode 7)

21:18   The Gundam GP01Fb destroys the Val Varo.
(Gundam 0083 episode 7)

21:40   The Albion escapes the moon's gravity well and heads for the Solomon Sea.
(Gundam 0083 episode 7)

U.C. 0083.11.05

The Albion engages a Delaz Fleet warship while en route to the Solomon Sea.
(Gundam 0083)
* This battle is recounted in Gundam 0083 CD Cinema 1.

07:00   A Delaz Fleet detachment commanded by Anavel Gato departs the Garden of Thorns and heads for the Solomon Sea operation area.
(Gundam 0083 episode 7)

U.C. 0083.11.07

Anavel Gato's fleet arrives at the Solomon Sea operation area.
(Gundam 0083)

U.C. 0083.11.08

While receiving supplies from the transport ship Edge, the Albion detects enemy forces in the vicinity of the Federation space battleship Birmingham.
(Gundam 0083 episode 8)
* According to the Gundam 0083 novelization, this takes place at approximately 14:35. See footnote 14: Gundam 0083 Novelization.

14:52   The Birmingham engages the Cima Fleet in combat, and the Albion dispatches its mobile suits to provide support.
(Gundam 0083 episode 8)
* The Musai-class space cruiser Nibelung is destroyed in this battle.

15:16   The Cima Fleet departs for its assigned operation area.
(Gundam 0083 episode 8)

15:27   South Burning is killed in action.
(Gundam 0083 episode 8)

U.C. 0083.11.10

00:00   The Gwazine-class space battleship Gwaden, the flagship of the Delaz Fleet, departs the Garden of Thorns.
(Gundam 0083 episode 9)

02:23   The Axis Advance Fleet returns to the Earth Sphere.
(Gundam 0083 episode 9)

05:25   The Federation space cruiser Lawrenceville is destroyed by enemy mobile suits in the Solomon Sea.
* Source: Gundam 0083 novelization. This marks the beginning of a series of attacks by the Delaz Fleet and their allies in the hours leading up to the naval review. See footnote 14: Gundam 0083 Novelization.

12:21   Anavel Gato's fleet launches its mobile suits to attack the Federation Forces naval review.
(Gundam 0083 episode 9)
* Source: Gundam 0083 novelization. See footnote 14: Gundam 0083 Novelization.

13:00   The Federation Forces begin a naval review at Konpeitoh, the first such ceremony since the One Year War.
(Gundam 0083 episode 9)

Delaz Fleet mobile suits begin a diversionary attack in Konpeitoh's Ramos patrol sector.
(Gundam 0083 episode 9)
* According to the Gundam 0083 novelization, this diversionary attack begins at approximately 13:40. See footnote 14: Gundam 0083 Novelization.

14:31   Anavel Gato uses the Gundam GP02A's nuclear warhead to attack the naval review. Green Wyatt is killed, and more than two-thirds of the participating vessels are destroyed or disabled.
(Gundam 0083 episode 10)

Kou Uraki's Gundam GP01Fb engages the Gundam GP02A in close combat.
(Gundam 0083 episode 10)
* According to the Gundam 0083 novelization, this duel begins at approximately 14:42. See footnote 14: Gundam 0083 Novelization.

15:05   The Gundam GP01Fb and Gundam GP02A are destroyed in battle. Kou Uraki and Anavel Gato escape unharmed.
(Gundam 0083 episode 10)

16:27   The Cima Fleet hijacks two space colonies in transit.
(Gundam 0083 episode 10)

16:50   The Albion changes course for La Vie En Rose.
(Gundam 0083 episode 10)

21:08   The Federation Forces patrol craft Strawberry 9 discovers the hijacking of the space colonies.
(Gundam 0083 episode 10)

21:11   The Cima Fleet destroys one mirror of each hijacked colony.
(Gundam 0083 episode 10)

21:26   The two hijacked space colonies collide, and one begins falling towards the moon. 15 hours and 49 minutes remain until impact.
(Gundam 0083 episode 10)

21:35   The Federation's remaining warships, led by the space battleship Toulon, depart Konpeitoh to pursue the runaway colony.
(Gundam 0083 episode 10)

U.C. 0083.11.11

04:14   The main Delaz Fleet joins the Cima Fleet to escort the runaway colony.
(Gundam 0083 episode 11)

05:35   Anavel Gato's detachment meets with the Axis Advance Fleet. Gato receives the mobile armor Neue Ziel.
(Gundam 0083 episode 11)

05:57   The Albion arrives at La Vie En Rose. 7 hours and 19 minutes remain until colony impact, and 5 hours and 13 minutes until the Federation fleet catches up with the colony.
(Gundam 0083 episode 11)

08:51   The advance forces of the Federation pursuit fleet engage the Neue Ziel.
(Gundam 0083 episode 11)
* According to the Gundam 0083 novelization, the 21st Mobile Squadron is the first unit to encounter the Neue Ziel.

09:25   The Axis Advance Fleet and Anavel Gato's detachment join the main Delaz Fleet.
(Gundam 0083 episode 11)

The Neue Ziel destroys a second Federation advance force.
(Gundam 0083 episode 11)
* According to the Gundam 0083 novelization, the 16th Squadron is the second unit to encounter the Neue Ziel. Its destruction is reported at 10:15 following a five-minute battle. See footnote 14: Gundam 0083 Novelization.

10:40   The Delaz Fleet uses orbital transport lasers on the lunar surface to ignite the runaway colony's propellant. The colony's course is changed, and it begins falling toward Earth. The Federation fleet, its propellant exhausted, is unable to escape lunar orbit and continue pursuit. 37 hours and 16 minutes now remain until impact.
(Gundam 0083 episode 11)

12:12   Anaheim Electronics engineer Lucette Audevie is killed.
(Gundam 0083 episode 11)

15:18   The Albion and the Gundam GP03 depart La Vie En Rose.
(Gundam 0083 episode 11)

U.C. 0083.11.12

10:06   The Gundam GP03 attacks the Delaz Fleet. 14 hours and 28 minutes remain until colony impact, and 9 hours and 28 minutes until it passes the critical intercept point.
(Gundam 0083 episode 12)

10:50   The Gundam GP03 engages the Neue Ziel in combat.
(Gundam 0083 episode 12)

13:51   The Federation fleet in lunar orbit completes resupply and resumes pursuit of the Delaz Fleet.
(Gundam 0083 episode 12)

17:15   Cima Garahau captures the bridge of the Gwaden.
(Gundam 0083 episode 12)

The Albion and the Gundam GP03 begin another sortie against the runaway colony. The Gundam GP03 again engages the Neue Ziel, and the Peer Gynt is destroyed.
(Gundam 0083 episode 12)
* According to the Gundam 0083 novelization, this sortie begins at approximately 17:50 and the Peer Gynt is destroyed at about 18:55. See footnote 14: Gundam 0083 Novelization.

19:34   The runaway colony passes the critical intercept point. 5 hours remain until impact.
(Gundam 0083 episode 12)

20:15   Aiguille Delaz is killed.
(Gundam 0083 episode 12)

21:47   The Federation Forces activate the Solar System II. 2 hours and 46 minutes remain until colony impact.
(Gundam 0083 episode 13)

22:41   Cima Garahau is killed in action.
(Gundam 0083 episode 13)

23:11   Anavel Gato completes the runaway colony's final orbital adjustments. 1 hour and 22 minutes remain until impact.
(Gundam 0083 episode 13)

U.C. 0083.11.13

00:00   The Federation Forces activate the Solar System II a second time.
(Gundam 0083 episode 13)

00:13   The runaway colony passes over the Jaburo base in South America. (Local time is 20:13 on November 12.)
(Gundam 0083 episode 13)

00:34   The runaway colony falls onto the North American continent.
(Gundam 0083 episode 13)

01:05   The Axis Advance Fleet withdraws.
(Gundam 0083 episode 13)

01:19   Anavel Gato is killed in action.
(Gundam 0083 episode 13)

U.C. 0083.11.23

The Federation Forces conduct courts-martial related to the Delaz Conflict. Eiphar Synapse is sentenced to death, and Kou Uraki to one year in prison.
(Gundam 0083 episode 13)

U.C. 0083.12.04

At the urging of Jamitov Hymem, the Federation Forces establish the Titans, an elite unit assigned to hunt down former Principality of Zeon forces.
(Gundam 0083 episode 13)

Director O'Sullivan of Anaheim Electronics' Von Braun division dies.
(Gundam 0083 episode 13)

U.C. 0084.03.10

The truth about the colony drop, and the details of the Gundam Development Project, are erased from official records. As a result, the charges against Kou Uraki are nullified.
(Gundam 0083 episode 13)
* According to the Gundam 0083 novelization, the falling colony is officially explained as the result of a transportation accident.

U.C. 0084.04.08

Kou Uraki is stationed at the Oakley base in North America.
(Gundam 0083 episode 13)

U.C. 0084.04.30

The Titans suppress an uprising in the suburbs of the lunar city of Ayers.
* Source: Master Grade RGM-79Q GM Quel manual.

U.C. 0084.06.17

After reorganizing the Sides, the Federation Assembly declares that the status quo of the Earth Sphere will be maintained.

U.C. 0084.07

The Federation Forces roll out the RMS-106 Hizack, the first new type of mass production mobile suit since the end of the One Year War.
* Source: Entertainment Bible 2.

U.C. 0084.07.08

The Buch Concern completes its spherical colony.

U.C. 0084.09.21

Char Aznable returns to the Earth Sphere and illegally accesses the Federation's military register. He then infiltrates the Federation Forces under the alias Quattro Bajeena.

U.C. 0084.12

The RX-121 Gundam TR-1 Hazel is assigned to the Titans Test Team.
(Advance of Zeta: The Flag of Titans)
* Source: The Encyclopedia of Gundam. Formally known as the Black Otter team, this unit is commanded by Wes Murphy and based aboard the Alexandria-class space cruiser Aswan. According to the story, the Hazel arrives before Eliard Hunter and Carl Matsubara join the team.

Eliard Hunter and Carl Matsubara are transferred to the Titans Test Team.
(Advance of Zeta: The Flag of Titans)

The Titans Test Team rescues a supply ship from enemy forces.
(Advance of Zeta: The Flag of Titans)

U.C. 0085

The Federation Forces complete a prototype version of the transformable mobile armor NRX-044 Asshimar.
* Source: Entertainment Bible 2.

The Federation Forces begin provisional deployment of the RMS-106 Hizack to various bases.
* Source: HG Universal Century RMS-106 Hizack manual.

The AEUG resistance group commissions new Gundam mobile suits from Anaheim Electronics.
* The 1/100 scale ZZ Gundam manual specifies the date as June 12, U.C. 0085, but this seems unlikely since the AEUG hasn't become active yet. The 1/144 scale ZZ Gundam manual says this event happens two years before the development of the Zeta Gundam, and the High Grade Zeta Gundam manual merely says it takes place in U.C. 0085, so I've specified only the year.

U.C. 0085.03

The Federation Forces establish an instructor corps at the asteroid base Pezun.
* Source: The Encyclopedia of Gundam.

U.C. 0085.05

The Titans Test Team battles Principality remnants at Side 1's Colony 25.
(Advance of Zeta: The Flag of Titans)

U.C. 0085.07

The Titans Test Team encounters enemy forces while escorting a transport ship to Side 1. The Gundam TR-1 Hazel sustains minor damage.
(Advance of Zeta: The Flag of Titans)

The Titans Test Team is ordered to provide rear support for a major operation at Side 1's Colony 30.
(Advance of Zeta: The Flag of Titans)

The Titans Test Team conducts a test of the Bizack TR-2 Bigwig at Side 1. During the test, a civilian shuttle is destroyed by Titan mobile suits.
(Advance of Zeta: The Flag of Titans)

U.C. 0085.07.31

The Titans use poison gas to suppress a demonstration at Side 1's Colony 30, wiping out the colony's three million inhabitants. Anti-Federation resistance increases as a result, and the Anti-Earth Union Group (AEUG) becomes active.

U.C. 0085.08

The Titans Test Team conducts another test of the Bizack TR-2 Bigwig's long-range beam cannon.
(Advance of Zeta: The Flag of Titans)
* The cannon unit malfunctions during the firing test, and pilot Carl Matsubara is forced to jettison it.

The Gundam TR-1 Hazel is heavily damaged during a battle between the Titans Test Team and Principality remnants.
(Advance of Zeta: The Flag of Titans)

The Titans Test Team receives the prototype Asshimar TR-3 Kehaar. The team's Hazel reserve unit is officially redesignated as the Gundam TR-1 Hazel II and assigned to Eliard Hunter.
(Advance of Zeta: The Flag of Titans)

U.C. 0085.09.08

Construction of the space colony Gryps, the new Titan headquarters, begins at Side 7.

U.C. 0085.10

The upgraded Gundam TR-1 Hazel Custom is reassigned to the Titans Test Team.
(Advance of Zeta: The Flag of Titans)

The Titans Test Team receives the TR-4 Dandelion. The team is then transferred to the Khartoum base in Africa to test the Asshimar TR-3 Kehaar under gravity.
(Advance of Zeta: The Flag of Titans)

U.C. 0086

Anaheim Electronics and the AEUG resistance group complete the RMS-099 Rick Dias and launch the Zeta Project.
* Most sources agree that these two events happen around the same time. Anaheim Journal says that the Zeta Project is launched in January of this year, but this seems rather early for the rollout of the Rick Dias, so I've specified only the year for now.

Paptimus Scirocco begins development of the PMX-000 Messala.
* Source: 1/220 scale PMX-000 Messala manual.

U.C. 0086.01

The Titans Test Team engages two Hizacks of unknown origin.
(Advance of Zeta: The Flag of Titans)

U.C. 0086.02

Federation Forces pilot Maxim Gunar defects to the AEUG resistance group.
(Advance of Zeta: The Flag of Titans)

U.C. 0086.02.06

The asteroid Axis begins its journey back to the Earth Sphere.

U.C. 0086.05

The Titans begin developing new mobile suits at Gryps.
* Source: Master Grade RGM-79Q GM Quel manual.

U.C. 0086.12

The Titans roll out the RX-178 Gundam Mark II, a new mobile suit based on the movable frame concept.
* Source: Master Grade RGM-79Q GM Quel manual.

U.C. 0087.02 (LATE)

The AEUG warships Argama and Mont Blanc depart from the Sweetwater colony.
* Source: Master Grade RMS-099 Rick Dias manual. The manual also includes an image of the Rick Dias performing flight testing en route to Side 7, with a dateline of February 27, but this presumably refers to the date of the flight test rather than the Argama's initial departure from Sweetwater.

U.C. 0087.03

The Titans Test Team is transferred to the space cruiser Izmir. During the transfer, the team engages AEUG mobile suits.
(Advance of Zeta: The Flag of Titans)

U.C. 0087.03.02

The Argama attacks Side 7, stealing two prototype RX-178 Gundam Mark II units from the Titans.
(Zeta Gundam episode 1)

U.C. 0087.03.16

The Argama and Mont Blanc attack a solar power satellite in Earth orbit.
(Zeta Gundam episode 6)

U.C. 0087.03.18

The Argama visits Side 1's Colony 30.
(Zeta Gundam episode 7)

U.C. 0087.03 (LATE)

The MSN-00100 Hyaku Shiki is assigned to the Argama.
* Source: Master Grade MSN-00100 Hyaku Shiki manual.

U.C. 0087.03.25

The Argama reaches the moon and docks at the lunar city of Amman.
(Zeta Gundam episode 8)

U.C. 0087.04

The AEUG begins deployment of the MSA-003 Nemo.
* Source: Master Grade MSA-003 Nemo manual.

U.C. 0087.04.20

The Argama conducts mobile suit performance tests in lunar airspace.
(Gundam Evolve episode 2)
* Source: The Encyclopedia of Gundam. The date is also specified in the episode itself.

U.C. 0087.04.23

The Titans receive the RMS-108 Marasai from Anaheim Electronics.
(Zeta Gundam episode 9)
* The HG Universal Century RMS-108 Marasai manual gives the date as April 21, but since this happens simultaneously with the AEUG attack on Granada, I've adjusted the date to match.

The AEUG attacks Granada and captures several Federation Forces warships in drydock. Meanwhile, Titan mobile suits attack Amman.
(Zeta Gundam episode 9)
* Source: The Encyclopedia of Gundam.

U.C. 0087.04.29

The Inter-Planetary Helium Carrier Jupitris returns to the Earth Sphere.

U.C. 0087.05

The Republic of Zeon aligns itself with the Titans. The Titans begin converting the asteroid A Baoa Qu into a fortress.
* Source: The Encyclopedia of Gundam.

U.C. 0087.05.03

The Argama rescues the space shuttle Temptation from an unknown mobile armor. Shuttle captain Bright Noa joins the AEUG.
(Zeta Gundam episode 10)

U.C. 0087.05.11

The AEUG attacks the Federation's Jaburo base in South America. The AEUG mobile suit force escapes aboard the transport plane Audhumla, and joins with the Karaba resistance group.
(Zeta Gundam episode 12)

U.C. 0087.05 (MID)

The Federation's Newtype Labs begin assisting the the Titans.
* Source: The Encyclopedia of Gundam.

U.C. 0087.05.22

The Audhumla lands at Florida's Kennedy Spaceport.
(Zeta Gundam episode 13)

U.C. 0087.06

The Titans Test Team performs an atmospheric entry test with the Gaplant TR-5 Fiver.
(Advance of Zeta: The Flag of Titans)

Audrey April of the Titans Test Team uses the Gundam TR-1 Hazel-Rah to battle a team of AEUG mobile suits.
(Advance of Zeta: The Flag of Titans)

The Titans attack a secret Karaba base on the Kamchatka peninsula. The Gaplant TR-5 Fiver launches from the Nevada base in North America to join the attack.
(Advance of Zeta: The Flag of Titans)

The AEUG begins a series of attacks on the Federation's Konpeitoh base.
(Advance of Zeta: The Flag of Titans)
* Source: Dengeki Hobby magazine, December 2005. These attacks continue until September of this year, preventing the Konpeitoh forces from providing support to the Titans.

U.C. 0087.06.08

The Titans begin relocating Gryps and the asteroid formerly known as A Baoa Qu to Luna II airspace in order to complete the Gate of Zedan.

U.C. 0087.06.29

The Titans dispatch the MRX-009 Psyco Gundam to attack New Hong Kong.
(Zeta Gundam episode 17)

U.C. 0087.07 (EARLY)

Rollout of the MSZ-006 Zeta Gundam at Anaheim Electronics' Von Braun factory.
* Source: Anaheim Journal.

U.C. 0087.07.08

The Titans use Mirai Noa and her children as hostages in an attempt to capture the Audhumla.
(Zeta Gundam episode 18)
* According to the animation, this takes place on the same day as the Audhumla's departure from New Hong Kong.

The Audhumla departs New Hong Kong.
(Zeta Gundam episode 19)

U.C. 0087.07 (LATE)

The RX-178 Gundam Mark II is overhauled at the lunar city of Von Braun, and its equipment is replaced with new versions manufactured by Anaheim Electronics.
* Source: Master Grade RX-178 Gundam Mark II manual. See footnote 15: A Sign of Zeta.

U.C. 0087.07.21

Karaba attacks the Federation's New Guinea base.
* Source: The Encyclopedia of Gundam.

The Titans begin their deployment for Operation Apollo.
* Source: Master Grade FXA-05D+RX-178 Super Gundam manual.

U.C. 0087.07.27

Paptimus Scirocco of the Jupiter Fleet formally joins the Titans.
(Zeta Gundam episode 21)
* Source: The Encyclopedia of Gundam.

U.C. 0087.08

Rollout of the RX-110 Gabthley and RX-139 Hambrabi.
* Source: Zeta Gundam Historica 07.

U.C. 0087.08 (EARLY)

The Zeta Gundam is deployed in combat for the first time.
(Zeta Gundam episode 21)
* Source: Anaheim Journal. See footnote 15: A Sign of Zeta.

U.C. 0087.08.10

The Titans launch Operation Apollo, capturing the lunar city of Von Braun.
(Zeta Gundam episode 23)

U.C. 0087.08.17

AEUG leader Blex Forer is assassinated.
(Zeta Gundam episode 24)

U.C. 0087.08.18

The AEUG recaptures Von Braun, driving the Titans from the moon.
(Zeta Gundam episode 24)
* Source: The Encyclopedia of Gundam.

The Federation Assembly passes legislation giving the Titans greatly increased authority.
(Zeta Gundam episode 24)
* Source: The Encyclopedia of Gundam.

U.C. 0087.08.24

The Titans attempt to drop Side 4's abandoned Colony 27 on the lunar city of Granada.
(Zeta Gundam episode 25)

U.C. 0087.08.26

The AEUG confirms that Gryps and the former A Baoa Qu are being relocated to Luna II airspace.
(Zeta Gundam episode 26)
* Source: The Encyclopedia of Gundam. At this point, A Baoa Qu is still in transit to its final location.

U.C. 0087.08.27

The bridge of the Titan space cruiser Alexandria is destroyed in battle.
(Zeta Gundam episode 26)
* Source: Master Grade FXA-05D+RX-178 Super Gundam manual.

U.C. 0087.09 (EARLY)

The Alexandria departs from the former A Baoa Qu to intercept the Argama in Earth satellite orbit. A civilian shuttle is destroyed during the battle.
(Zeta Gundam episode 27)
* Source: The Encyclopedia of Gundam.

U.C. 0087.09.14

A Titan fleet gathers in Side 2 airspace.
(Zeta Gundam episode 28)

U.C. 0087.09.21

The Titans use poison gas to stage an unsuccessful attack on Side 2's Colony 25.
(Zeta Gundam episode 29)

U.C. 0087.10.10

The Titans bomb Von Braun's spaceport.
(Zeta Gundam episode 31)
* Source: The Encyclopedia of Gundam.

U.C. 0087.10.12

The asteroid Axis arrives in the Earth Sphere.

U.C. 0087.10.14

The AEUG sends a delegation to the Principality remnants based at Axis, but the negotiations break down.
(Zeta Gundam episode 33)

U.C. 0087.10.15

The Axis forces ally themselves with the Titans.
(Zeta Gundam episode 33)

U.C. 0087.10.19

The Argama docks at La Vie En Rose for resupply and repair.
(Zeta Gundam episode 34)

U.C. 0087.11

Rollout of the MSZ-006A1 Zeta Plus at Anaheim Electronics' California factory.
* Source: Master Grade MSZ-006A1 Zeta Plus manual.

U.C. 0087.11.02

A joint AEUG and Karaba force attacks the Federation's Kilimanjaro base.
(Zeta Gundam episode 35)

U.C. 0087.11.03

The Kilimanjaro base is destroyed. Jamitov Hymem escapes into space.
(Zeta Gundam episode 36)

U.C. 0087.11.16

AEUG and Karaba forces occupy the Federation Assembly building in Dakar, Senegal. Char Aznable informs the world of the truth about the Titans.
(Zeta Gundam episode 37)

U.C. 0087.11.17

Char Aznable and Kamille Bidan return to space.
(Zeta Gundam episode 38)
* According to the animation, this takes place the day after Char's Dakar speech.

U.C. 0087.11.24

The Argama stops at Side 2's Colony 13 for resupply.
(Zeta Gundam episode 39)

U.C. 0087.11.29

Gryps 2 departs Luna II airspace, and begins moving into position to fire on the lunar city of Granada.
* Source: The Encyclopedia of Gundam.

U.C. 0087.11.30

The Argama carries out reconnaissance on the Gate of Zedan.
(Zeta Gundam episode 40)

U.C. 0087.12.06

The Titans attack the civilian spaceship Prospero in Earth orbit.
(Green Divers)
* Source: Gundam Ace 007.

U.C. 0087.12.07

The Titans use the Gryps 2 colony laser to destroy Side 2's Colony 18.
(Zeta Gundam episode 40)

U.C. 0087.12.14

The Titans attack Side 2's Colony 21 with poison gas, wiping out all its inhabitants.
(Zeta Gundam episode 41)

U.C. 0087.12.26

The AEUG reaches a secret agreement with the Principality remnants based at Axis. The Axis forces destroy Gryps 2's engines.
(Zeta Gundam episode 43)
* Source: The Encyclopedia of Gundam.

U.C. 0088.01.18

The Axis asteroid collides with the Gate of Zedan, and the AEUG attacks the Titan fleet as it attempts to escape. Meanwhile, the Axis forces capture Gryps 2.
(Zeta Gundam episode 45)
* The Encyclopedia of Gundam claims that the AEUG destroys half the Titan fleet in this "Mole Strike Operation," leaving both sides with equal fighting strength.

Rollout of the MSA-004K Nemo III.
* According to B-CLUB 6, the first unit is completed on the same day that Axis collides with the Gate of Zedan.

U.C. 0088.01.25

Negotiations between the Principality remnants and the Titans collapse. Jamitov Hymem is assassinated, and Paptimus Scirocco seizes control of the Titans.
(Zeta Gundam episode 46)

The Pezun Incident begins. Officers of the Federation Forces' instructor corps seize control of the asteroid base Pezun.
(Gundam Sentinel)
* Source: Gundam Wars III: Gundam Sentinel. Using nuclear pulse propulsion, the rebels then move the asteroid base to Lagrange point 4.

U.C. 0088.01.27

The rebel officers at Pezun eliminate the Federation Forces mobile suits stationed at the asteroid base.
(Gundam Sentinel)
* Source: Gundam Wars III: Gundam Sentinel. This battle takes place the night before the formation of the New Desides.

U.C. 0088.01.28

The rebel officers at Pezun declare themselves the New Desides.
(Gundam Sentinel)
* Source: HG Universal Century RMS-141 Xeku Eins manual.

U.C. 0088.02 (EARLY)

Paptimus Scirocco's Jupitris fleet wipes out the remainder of Bask Om's forces.
* Source: The Encyclopedia of Gundam.

U.C. 0088.02.02

The AEUG launches Operation Maelstrom and captures Gryps 2.
(Zeta Gundam episode 47)

U.C. 0088.02 (MID)

The 127th Squadron of the Federation's Side 2 garrison is destroyed during a reconnaissance mission in Pezun airspace.
(Gundam Sentinel)
* Source: Gundam Wars III: Gundam Sentinel. This incident takes place roughly one week before the formation of Taskforce Alpha.

U.C. 0088.02.17

The AEUG uses the Gryps 2 colony laser to change the course of the Axis asteroid before it collides with Granada.
(Zeta Gundam episode 48)
* Source: Gundam Ace 007. Zeta Gundam Historica 11, however, places this event on February 10.

U.C. 0088.02.20

The AEUG, Titans, and Axis forces meet in a three-way fleet battle for control of Gryps 2.
(Zeta Gundam episode 49)

U.C. 0088.02.21

The Argama enters the combat zone. The Radish is destroyed.
(Zeta Gundam episode 49)

U.C. 0088.02.22

The AEUG annihilates the Titans fleet with the Gryps 2 colony laser. The AEUG loses the majority of its fighting strength, and Char Aznable is missing in action.
(Zeta Gundam episode 50)

Eliard Hunter's damaged Gaplant is recovered by the Alexandria-class space cruiser Aswan.
(Advance of Zeta: The Flag of Titans)

U.C. 0088.02.25

The Federation Forces dispatch Taskforce Alpha to suppress the rebellion at Pezun. Five warships launch from the Baikonur base, led by the Argama-class assault cruiser Pegasus III.
(Gundam Sentinel)
* Source: Master Grade FA-010-A FAZZ manual.

U.C. 0088.02.29

The Principality remnants based at Axis dispatch occupation forces to each Side.
* The space cruiser Endra, under the command of Mashymre Cello, is dispatched to Side 1's Shangri-La colony. According to the 1/144 scale Dreissen model kit manual, Rakan Dahkaran is assigned to take control of the Arcadia colony. An article in the September 1986 issue of The Anime magazine claims that the space cruiser Randra, commanded by Chara Soone, is dispatched to the El Dorado colony. See footnote 16: Axis and Neo Zeon.

Taskforce Alpha arrives in Pezun airspace and engages the enemy for the first time.
(Gundam Sentinel)
* Source: Gundam Wars III: Gundam Sentinel. The Taskforce Alpha space cruisers Takao and Long Beach are destroyed by satellite missiles during this engagement. The space cruisers Ulysses and Cumberland are then detached from the Federation Forces garrison at Side 5 to replace the lost ships.

U.C. 0088.03.01

The Argama docks at Side 1's Shangri-La colony for repair and resupply.
(Gundam ZZ episode 2)

Taskforce Alpha destroys the power satellite SOL 7804.
(Gundam Sentinel)
* Source: Gundam Wars III: Gundam Sentinel.

U.C. 0088.03.03

The space cruiser Endra, of the Axis advance fleet, enters Shangri-La. The Argama conceals itself within the colony.
(Gundam ZZ episode 3)

U.C. 0088.03.04

A fleet commanded by Admiral Brian Aeno departs from the relay station Penta in Earth orbit.
(Gundam Sentinel)
* Source: Gundam Wars III: Gundam Sentinel.

U.C. 0088.03.06

The Admiral's Rebellion. The Aeno Fleet allies itself with the New Desides.
(Gundam Sentinel)
* Source: Gundam Wars III: Gundam Sentinel. The Aeno Fleet soon loses four of its space cruisers as the Pasadena and Danang decline to join the rebellion, and the Dortmund and Panama II are lost in battle with the Federation Forces garrison at Side 4. The Aeno Fleet then takes refuge in a shoal zone at Lagrange point 1.

Eight warships of the Federation's Lunar Orbital Fleet arrive in Pezun airspace to assist Taskforce Alpha.
(Gundam Sentinel)
* Source: Gundam Wars III: Gundam Sentinel.

U.C. 0088.03.07

06:00   The Battle of Pezun begins. The New Desides escape from Pezun, destroying the asteroid base with nuclear explosives.
(Gundam Sentinel)
* Source: Master Grade MSZ-006C1 Zeta Plus manual. The time is specified in the story text. One New Desides space cruiser is destroyed by the Lunar Orbital Fleet.

U.C. 0088.03.09

A new type of core fighter makes contact with the Argama.
(Gundam ZZ episode 7)

U.C. 0088.03.10

Taskforce Alpha receives orders to continue its pursuit of the New Desides fleet.
(Gundam Sentinel)
* Source: Gundam Wars III: Gundam Sentinel.

U.C. 0088.03.11

The Argama escapes Shangri-La.
(Gundam ZZ episode 8)

U.C. 0088.03.12

The Argama heads for La Vie En Rose. Mobile suits from the Endra attempt a surprise attack on the Argama.
(Gundam ZZ episode 9)

The New Desides fleet reaches lunar orbit and docks at Ayers City's orbital relay station.
(Gundam Sentinel)
* Source: Gundam Wars III: Gundam Sentinel.

U.C. 0088.03.13

04:00   After establishing contact with the New Desides, the Aeno Fleet arrives in lunar orbit.
(Gundam Sentinel)
* Source: Gundam Wars III: Gundam Sentinel. The time is specified in the story text.

10:00   Taskforce Alpha launches an operation to capture Ayers City. The operation ends in failure, and the Taskforce Alpha mobile suits suffer heavy losses.
(Gundam Sentinel)
* Source: Gundam Wars III: Gundam Sentinel. The time is specified in the story text. New Desides leader Brave Cod uses the Gundam Mark V to destroy nine Taskforce Alpha mobile suits, and eleven more are destroyed by the Aeno Fleet and the effects of a logistic bomb hidden in their software.

The Federation's Home Fleet joins Taskforce Alpha in lunar orbit.
(Gundam Sentinel)
* Source: Gundam Wars III: Gundam Sentinel.

U.C. 0088.03.14

Taskforce Alpha reorganizes its mobile suit squadrons in preparation for Operation Eagle Fall, a second attempt to capture Ayers City. Four warships are detached from the Home Fleet to form Taskforce Beta.
(Gundam Sentinel)
* Source: Gundam Wars III: Gundam Sentinel.

U.C. 0088.03.15

Chara Soone boards the Endra.
(Gundam ZZ episode 10)

The Argama receives the Core Base.
(Gundam ZZ episode 10)

U.C. 0088.03.16

The Core Top arrives from La Vie En Rose. The ZZ Gundam is completed.
(Gundam ZZ episode 11)

U.C. 0088.03.17

Operation Eagle Fall begins. Taskforces Alpha and Beta attack the New Desides fleet, while the main force of the Home Fleet engages the Aeno Fleet.
(Gundam Sentinel)
* Source: Master Grade FA-010-A FAZZ manual. After Taskforces Alpha and Beta destroy the New Desides flagship Kilimanjaro, the remaining New Desides warships withdraw to support the Aeno Fleet. Taskforces Alpha and Beta then land their mobile suits on the lunar surface and surround Ayers City.

New Desides leader Brave Cod uses the Gundam Mark V to wipe out the Pegasus III's FAZZ team.
(Gundam Sentinel)
* Source: Master Grade FA-010-A FAZZ manual.

U.C. 0088.03.19

The Endra attacks La Vie En Rose. The Argama makes contact with La Vie En Rose.
(Gundam ZZ episode 12)

U.C. 0088.03.24

The New Desides begin their escape from Ayers City.
(Gundam Sentinel)
* Source: Gundam Wars III: Gundam Sentinel. Using a mass driver, the New Desides begin launching their mobile suits into space. The remaining warships of the Aeno Fleet withdraw from Ayers City airspace.

U.C. 0088.03.25

The Argama docks at Moon Moon.
(Gundam ZZ episode 14)

U.C. 0088.03.26

The Endra is destroyed. The Argama captures Chara Soone and departs Moon Moon.
(Gundam ZZ episode 15)

U.C. 0088.03.28

The Argama returns to La Vie En Rose.
(Gundam ZZ episode 16)

The Endra crew are transferred to the Endra-class space cruiser Mindra.
(Gundam ZZ episode 16)

New Desides leader Brave Cod is killed in battle, and Ayers City surrenders. The surviving members of the New Desides escape the moon with the help of an Axis fleet.
(Gundam Sentinel)
* Source: Master Grade MSZ-006C1 Zeta Plus manual. The Axis fleet proceeds to Lagrange point 1 to rendezvous with the Aeno Fleet.

U.C. 0088.03.31

06:00   The Pegasus III resumes its pursuit of the New Desides.
(Gundam Sentinel)
* Source: Gundam Wars III: Gundam Sentinel. The time is specified in the story text.

U.C. 0088.04.01

The Mindra captures an AEUG launch. Axis soldiers use the captured launch to infiltrate the Argama.
(Gundam ZZ episode 16)

U.C. 0088.04.02

While Axis forces delay the Pegasus III, the New Desides seize control of the relay station Penta.
(Gundam Sentinel)
* Source: Gundam Wars III: Gundam Sentinel.

U.C. 0088.04.04

The New Desides leave Penta to carry out attacks on Dakar and the Federation Forces general headquarters. Their remaining forces are wiped out by the Pegasus III and its mobile suits.
(Gundam Sentinel)
* Source: Master Grade MSZ-006C1 Zeta Plus manual. The Aeno Fleet flagship Bull Run and the space cruiser Aoba surrender to the Pegasus III.

U.C. 0088.04.05

Taskforce Alpha's mission is completed. The Pezun Incident ends.
(Gundam Sentinel)
* Source: The Encyclopedia of Gundam.

U.C. 0088.04.12

After departing La Vie En Rose, the Argama tests its newly installed hyper mega particle cannon on an abandoned colony.
(Gundam ZZ episode 17)
* See footnote 17: Judau at Axis.

U.C. 0088.04.29

Judau Ashta infiltrates the asteroid Axis.
(Gundam ZZ episode 18)
* See footnote 17: Judau at Axis.

U.C. 0088.05

The court martial of Eliard Hunter begins.
(Advance of Zeta: The Flag of Titans)

U.C. 0088.05.08

Judau Ashta again enters the asteroid Axis, and surrenders to the Endra-class space cruiser Sandra. The ZZ Gundam battles the Qubeley Mark II in the residential area of Axis.
(Gundam ZZ episode 19)
* See footnote 17: Judau at Axis.

U.C. 0088.05.19

The Argama fires at Axis with its hyper mega particle cannon, but the asteroid is unharmed.
(Gundam ZZ episode 19)
* See footnote 17: Judau at Axis.

U.C. 0088.06.06

Axis advance forces descend to Earth.
* See footnote 18: Axis Landing Operations.

U.C. 0088.07.08

The Argama docks at the lunar city of Granada for resupply.
(Gundam ZZ episode 20)

U.C. 0088.07.09

Axis forces attempt to bomb Granada's port, but destroy their own command ship instead.
(Gundam ZZ episode 21)

U.C. 0088.07 (MID)

A new MSN-00100 Hyaku Shiki unit is assigned to the Argama.
(Gundam ZZ episode 22)
* Source: Master Grade MSN-00100 Hyaku Shiki manual. The Master Grade manual says that the original Hyaku Shiki is repaired and reassigned to the Argama, but the animation indicates that this is a newly constructed machine.

U.C. 0088.07.13

The Axis forces adopt the name Neo Zeon. The Neo Zeon flagship Sadalahn heads for Earth, and Neo Zeon mobile suits land on the planet.
(Gundam ZZ episode 22)
* Source: The Encyclopedia of Gundam. See footnote 18: Axis Landing Operations.

U.C. 0088.07.20

The Sandra joins the Sadalahn.
(Gundam ZZ episode 23)

U.C. 0088.08.01

The main Neo Zeon force begins an invasion of Earth. Judau Ashta rescues Elpeo Ple during atmospheric entry.
(Gundam ZZ episode 23)
* According to the animation, only the flagship Sadalahn and the space cruisers Sandra and Mindra descend to Earth at this point, and the rest of the Neo Zeon fleet apparently remains in satellite orbit.

U.C. 0088.08.02

The Argama lands off the western coast of Africa. The Gundam Team is detached from the Argama in order to carry out a pincer attack on Dakar.
(Gundam ZZ episode 24)

U.C. 0088.08.09

The Gundam Team battles the forces of Desert Rommel.
(Gundam ZZ episode 25)

U.C. 0088.08.29

Neo Zeon occupies Dakar.
* The published timelines claim that both former Principality forces and Titans remnants rally behind the leadership of Neo Zeon. However, the animation indicates that the Titans are not yet under Neo Zeon control, so I've omitted them from this entry.

U.C. 0088.08.31

Haman Karn and Mineva Zabi arrive in triumph at Dakar. AEUG and Karaba forces assault the reception hall.
(Gundam ZZ episode 27)

U.C. 0088.09.21

Neo Zeon forces attack El Golea to prevent the Argama from reaching a Karaba base.
(Gundam ZZ episode 29)

U.C. 0088.09.23

The Gundam Team heads for the free trading town of Ghardaia.
(Gundam ZZ episode 30)

Glemy Toto joins forces with the Blue Team of the African Liberation Front.
(Gundam ZZ episode 30)

U.C. 0088.10.09

The Gundam Team battles the Blue Team. Dido Kaltoha is killed in action.
(Gundam ZZ episode 30)

U.C. 0088.10.14

The African Liberation Front attacks Ghardaia with the support of Neo Zeon.
(Gundam ZZ episode 31)

U.C. 0088.10.21

The Argama resupplies at a Karaba base near Chott Melrhir. Joining with the Gundam Team, it heads for Britain.
(Gundam ZZ episode 32)

U.C. 0088.10.26

Bright Noa and Judau Ashta learn that the Federation government intends to turn over Side 3 to Neo Zeon. They are imprisoned for their protests.
(Gundam ZZ episode 33)

U.C. 0088.10.28

A Neo Zeon fleet led by the Endra II takes control of a Side 4 colony and sets it falling toward Earth.

U.C. 0088.10.30

The colony drop is detected.
(Gundam ZZ episode 35)

The Argama joins forces with the Audhumla. Hayato Kobayashi is killed.
(Gundam ZZ episode 35)

U.C. 0088.10.31

Neo Zeon drops a colony on Dublin.
(Gundam ZZ episode 35)

U.C. 0088.11.02

The Argama arrives at a Karaba base and its crew return to space.

U.C. 0088.11.03

The Nahel Argama is commissioned. Beecha Oleg becomes its acting captain.
(Gundam ZZ episode 37)

U.C. 0088.11.06

The La Vie En Rose follows the Nahel Argama into a shoal zone.
(Gundam ZZ episode 38)

U.C. 0088.11.07

The Nahel Argama is formally assigned to suppress Neo Zeon, and heads for Side 3.
(Gundam ZZ episode 38)

U.C. 0088.11.11

The Nahel Argama docks at Side 3's Tigerbaum colony.
(Gundam ZZ episode 40)

U.C. 0088.11.14

The Federation government transfers Side 3 to Neo Zeon control. Neo Zeon withdraws its forces from Earth.

U.C. 0088.11.22

The Nahel Argama crew infiltrate the asteroid Cicero in order to enter Core 3. A revolt breaks out against Neo Zeon.
(Gundam ZZ episode 42)

U.C. 0088.12.25

A rebellion breaks out within Neo Zeon. Glemy Toto's forces occupy the asteroid Axis.

U.C. 0089.01.04

The Nahel Argama mobilizes without waiting for support from the AEUG and Federation Forces.
(Gundam ZZ episode 44)
* The animation mentions, and Data Collection 6 confirms, that a large Federation fleet eventually leaves Granada and heads for Side 3 airspace. The Neo Zeon forces learn of this at the same time Judau enters Core 3, so the deployment presumably takes place between January 4 and January 8.

U.C. 0089.01.08

Judau Ashta enters Core 3 in order to take Mineva Zabi hostage.
(Gundam ZZ episode 44)

U.C. 0089.01.10

The forces of Haman Karn and Glemy Toto begin a fleet battle.
(Gundam ZZ episode 44)

U.C. 0089.01.11

The La Vie En Rose is destroyed while protecting the Nahel Argama. Emary Ounce is killed.
(Gundam ZZ episode 44)

U.C. 0089.01.13

Haman Karn leaves Core 3 to join the battle. Mashymre Cello repulses Ple-Two's Queen Mansa, and is then killed by the Space Wolf team.
(Gundam ZZ episode 45)

U.C. 0089.01.14

The Nahel Argama confronts the forces of Glemy Toto. Glemy withdraws his forces and deploys his Newtype Corps.
(Gundam ZZ episode 45)

U.C. 0089.01.15

The ZZ Gundam, Zeta Gundam, and Gundam Mark II enter the asteroid Axis.
(Gundam ZZ episode 46)

U.C. 0089.01.16

The asteroid Axis collides with Core 3.
(Gundam ZZ episode 46)

U.C. 0089.01.17

The AEUG defeats Neo Zeon. The whereabouts of Mineva Zabi are unknown.
(Gundam ZZ episode 47)

U.C. 0089.03.15

Jupiter energy transportation resumes. The Jupitris II departs.
(Gundam ZZ episode 47)

U.C. 0089.05.01

The Federation Forces reorganize their system for managing massive asteroids.
* Source: Entertainment Bible 2.

U.C. 0089.08.25

The Federation government tightens its economic sanctions against colonies that support spacenoid movements.
* Source: Entertainment Bible 2.

U.C. 0090.01

New anti-Federation organizations such as EGUM and NSP become active.
* Source: Entertainment Bible 2.

U.C. 0090.02

The space colony Sweetwater is converted into a housing facility for refugees.
* Source: Entertainment Bible 2.

U.C. 0090.03.21

The Federation Forces establish a new auxiliary unit called Londo Bell.
* Source: Master Grade RX-93 Nu Gundam manual.

U.C. 0092.08

The Federation Forces relocate their headquarters to Lhasa, Tibet.
* Source: Entertainment Bible 2.

U.C. 0092.12.13

Neo Zeon forces hint at an attack on the Earth Federation.

U.C. 0092.12.19

The Londo Bell space cruiser Ra Zyme enters the Sweetwater colony. Its mobile suits battle an EGUM mobile suit.
(High Streamer)
* Source: Gundam Ace 028.

U.C. 0092.12.22

A Neo Zeon fleet commanded by Char Aznable takes control of the Sweetwater colony.

U.C. 0092.12.25

The Federation Forces reinforce Londo Bell. Bright Noa and the space battleship Ra Cailum are assigned to the unit.

U.C. 0093.02.27

During an interview program, Char Aznable effectively declares war against the Earth Federation.

U.C. 0093.03.03

The Neo Zeon fleet departs Sweetwater.

U.C. 0093.03.04

5th Luna crashes into the Federation Forces headquarters in Lhasa, Tibet.
(Char's Counterattack)

U.C. 0093.03.06

The Neo Zeon forces and the Federation government hold secret peace negotiations at Side 1's Londenion colony.
(Char's Counterattack)

U.C. 0093.03.12

Feigning surrender, the Neo Zeon fleet recaptures Axis and attempts to drop it onto Earth.
(Char's Counterattack)

U.C. 0093.09

The Strategy and Tactics Research Institute, a Federation Forces advisory agency, is reorganized into the Strategic Naval Research Institute (SNRI).

U.C. 0100

The Republic of Zeon gives up its autonomy, and the Federation Forces declare the eradication of all conflict.

U.C. 0102

SNRI proposes to the Federation government that it should scale down its mobile suits.

U.C. 0103

The anti-Federation organization known as Mufti destroys an orbital surveillance satellite.

U.C. 0104

Hathaway Noa joins Mufti and adopts the alias Mufti Nabiyu Erin.
* Source: Gundam Ace 028. Although this alias is often rendered as Mafty, the Hathaway's Flash novels say that it's a combination of Sudanese, Arabic, and ancient Irish names, and I've translated it accordingly.

U.C. 0104.02.28

The terrestrial Federation Forces are reinforced. Terrestrial Manhunter organizations and efforts to expose illegal residents are strengthened.

U.C. 0105.04.09

The Minovsky craft-equipped mobile suit Penelope travels from the lunar surface to Australia.

U.C. 0105.04.18

The Owenberry Massacre. The Federation Forces' Kimberly unit massacres the inhabitants of Owenberry, Australia, killing more than 2,000 people.
* Source: Gundam Ace 028.

U.C. 0105.04.19

Terrorists claiming to be part of Mufti attempt to hijack the space shuttle Haunzen.
(Hathaway's Flash)

U.C. 0105.04.20

Mufti attacks the Tasadai hotel in Davao, killing four officials of the Earth Federation government.
(Hathaway's Flash)
* Source: Gundam Ace 028. As of this attack, Mufti has killed 18 Federation cabinet members and more than 300 civilians.

The Xi Gundam arrives on Earth.
(Hathaway's Flash)

U.C. 0105.04.21

The Xi Gundam and Penelope battle at sea near Indonesia's Halmahera island.
(Hathaway's Flash)

U.C. 0105.04.22

The Federation's Manhunter forces and the Circe Unit suppress a disturbance on Davao's main street, killing more than 100 people and arresting over 500 more.
(Hathaway's Flash)
* Source: Gundam Ace 028.

U.C. 0105.04.25

In a broadcast ultimatum, Mufti demands the withdrawal of a measure that expands the investigative powers of the Federation government.
(Hathaway's Flash)
* Source: Gundam Ace 028.

U.C. 0105.04.26

Mufti attacks a meeting of the Federation Assembly in Adelaide, Australia. The Xi Gundam is trapped by a barrier system installed around the meeting site. Mufti's leader is arrested, and the measure is approved.
(Hathaway's Flash)

U.C. 0105.04.27

The Federation Forces' 13th Autonomous Corps arrives in Adelaide.
(Hathaway's Flash)

U.C. 0105.05.01

Mufti Nabiyu Erin, the leader of the anti-Federation organization known as Mufti, is executed.
(Hathaway's Flash)

U.C. 0105.06

The Federation Forces intensify their suppression of anti-Earth Federation organizations. The Mufti organization goes underground and, on the surface, the anti-Federation movement appears to be quieted.

For some additional information on Universal Century history, see GundamOfficial's U.C. Timeline and U.C. Glossary, or Dafydd Neal Dyar's extensive Master Timeline.

Many of the recent Gundam works take place in new worlds with their own histories and timelines. I've compiled a separate timeline for the After War calendar used in Gundam X, and GundamOfficial provides timelines for G Gundam's Future Century and Gundam Seed's Cosmic Era.