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 an assumed name.

U.C. 0085.07.31
The Titans use poison gas to suppress a demonstration at Colony 30 of Side 1, wiping out the colony's three million inhabitants. Anti-Federation resistance increases as a result, and the Anti-Earth Union Group (AEUG) is organized.

U.C. 0085.09.08
Construction of the space colony Gryps, the new Titan headquarters, begins at Side 7.

U.C. 0086.02.06
The asteroid Axis begins its journey back to the Earth sphere.

U.C. 0087.03.02
The AEUG warship Argama attacks Side 7, stealing three prototype RX-178 Gundam Mk.II units from the Titans. [Zeta Gundam, episode 1-3]

U.C. 0087.03.16
The Argama attacks a solar power satellite in Earth orbit. [Zeta Gundam, episode 6]

U.C. 0087.03.18
The Argama docks at Side 1's Colony 30. [Zeta Gundam, episode 7]

U.C. 0087.03.25
The Argama reaches the moon and docks at the lunar city of Amman. [Zeta Gundam, episode 8]

U.C. 0087.04.29
The Inter-Planetary Helium Carrier Jupitris returns to the Earth sphere.

U.C. 0087.05.03
The Argama rescues the space shuttle Temptation from an unknown mobile armor. The shuttle's captain, Commander 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, episodes 11-12]

U.C. 0087.05.22
The Audhumla lands at Florida's Kennedy Spaceport. [Zeta Gundam, episode 13]

U.C. 0087.06.08
The Titans relocate Gryps and the asteroid formerly known as A Baoa Qu to the vicinity of Luna II. The Gate of Zedan is completed.

U.C. 0087.06.29
The Titans dispatch the MRX-009 Psyco Gundam to attack New Hong Kong. [Zeta Gundam, episode 17]

U.C. 0087.07.08
The Audhumla departs New Hong Kong. [Zeta Gundam, episode 19]

U.C. 0087.08.10
The Titans launch Operation Apollo, capturing the lunar city of Von Braun. [Zeta Gundam, episode 23]

U.C. 0087.08.16
The Earth Federation Assembly passes legislation placing the entire Federation Forces under Titan control. Commodore Blex Forer, leader of the AEUG, is assassinated the following day. [Zeta Gundam, episode 24]

U.C. 0087.08.24
The Titans attempt to drop a space colony on the lunar city of Granada. [Zeta Gundam, episode 25]

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. 0087.10.12
The asteroid Axis arrives in the Earth sphere.

U.C. 0087.10.14
The AEUG sends a delegation to negotiate with the renegade Principality forces based at Axis, but the discussions break down. The following day, the Axis forces ally themselves with the Titans. [Zeta Gundam, episode 33]

U.C. 0087.11.02
A joint AEUG and Karaba force attacks the Federation's Kilimanjaro Base. The base collapses the following day. [Zeta Gundam, episodes 35-36]

U.C. 0087.11.16
The AEUG occupies the Federation Assembly building in Dakar, Senegal, and denounces the Titans before the whole world. [Zeta Gundam, episode 37]

U.C. 0087.11.24
The Argama stops at Side 2's Colony 13 for resupply. [Zeta Gundam, episode 39]

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. 0088.01.18
The renegade Principality forces use the Axis asteroid to destroy the Gate of Zedan, and meanwhile capture the Gryps 2 colony laser for themselves. [Zeta Gundam, episode 45]

U.C. 0088.01.25
Negotiations between the renegade Principality forces and the Titans break down. Paptimus Scirocco seizes control of the Titans. [Zeta Gundam, episode 46]

U.C. 0088.02.02
The AEUG launches Operation Maelstrom and captures Gryps 2. [Zeta Gundam, episode 47]

U.C. 0088.02.20
The AEUG, Titans, and Axis forces meet in a three-way fleet battle around Gryps 2. [Zeta Gundam, episode 49]

U.C. 0088.02.22
The Titans are wiped out, while the AEUG loses the majority of its fleet. Char Aznable is missing in action. [Zeta Gundam, episode 50]

U.C. 0088.02.29
The renegade Principality forces based at Axis proclaim the revival of Zeon. Adopting the name "Neo Zeon," they dispatch forces to take control of each Side.

U.C. 0088.03.01
The Argama docks at Side 1's Colony 1 for resupply and repair. [Gundam ZZ, episode 2]

U.C. 0089.01.17
The first Neo Zeon movement is defeated. [Gundam ZZ, episode 47]

U.C. 0089.08.25
The Federation tightens sanctions against colonies that support spacenoid movements.