Advance of Zeta: The Flag of Titans

Set before Mobile Suit Zeta Gundam, the story follows the Titans Test Team, Black Otter Team, on their mission to test new mobile suits for the Titans. It begins with Eliard Hunter, an Earth Federation mobile suit pilot being assigned to the Titans and transferring to the Aswan, an Alexandria class carrier. There he meets Carl Matsubara, another new Titans recruit, Audrey April a skilled pilot and chief of test operations and data gathering, and Wes Murphy, a veteran of the One Year War and the Delaz Conflict. The Black Otter team doesn’t just carry out test runs, it also participates in real combat missions against Zeon Remnants and later, against AEUG.

The manga adaptation of Gundam 0083. Years after the One Year War ended, in hopes of resurrecting the Principality of Zeon forces, Anavel Gato (also known as the "Nightmare of Solomon") steals a Gundam Unit 02 from the Earth Federation Forces. In the heat of battle Kou Uraki enters Unit 01 to confront Gato. *Note: Includes three extra chapters.*

Char Aznable, once the most iconic ace for the enemy in the previous war, is now a Federation soldier going by a different name. When the theft of a new Gundam leads him to cross paths with a Newtype boy named Kamille, their meeting sparks a conflict between the anti-government AEUG and the Federation’s brutally oppressive faction known as the Titans… (Source: Yen Press)

A.O.Z Re-Boot Gundam Inle: Kuro Usagi no Muta Yume is set in U.C. 0091after the end of the First Neo Zeon War. Zeon Remnants had retreated to Mars, forming "ReZeon" under General Alicia Zabi. By absorbing the Titans remnants after the Gryps War, they strengthened their military strength. This story depicts the Titans comeback that began on Mars. Their dream--what does "the shining star again" mean? Look, with a bird's-eye view, at the memories of their battles spun in history. *Note: The first chapter was pre-published on April 25, 2014 in Dengeki Hobby Magazine.*

In the year UC 0079, during the One Year War of the first Gundam series and eight years before the story in Zeta Gundam, a boy named Van Asiliaino and his friends attempt to flee the war, and their fates change when they meet a certain soldier. (Source: Gundam Wiki)