CtrlK

Mobile Suit Zeta Gundam Define

Kidou Senshi Zeta Gundam: Define
機動戦士Ζガンダム Define
Мобильный воин Гандам Зета: Определение

Prequel

manga
A direct sequel to Mobile Suit Gundam, and a prequel to Gundam 0083 and Zeta/ZZ Gundam, CDA tells the story of Colonel Char Aznable directly after the One Year War. He heads toward Axis after the battle of A Baoa Qu with the remaining Zeon forces, where he meets a 14-year old Haman Karn, who begins to fall in love with Char. Char must also deal with Colonel Enzo, who plans to restart the war with the EFSF.

(Source: Anime News Network)

Alternative

manga
and 1 more
The Year is Universal Century 0087, seven years have now passed since the Principality of Zeon declared their surrendered to the Earth Federation thus ending the events that have now become known as the One Year War. Now an organized hunt for the remnants of Zeon is underway under the leadership of the Earth Federation Forces Elite Forces the "Titans", An elite force that is accountable only to themselves. However this tyrannical force is not unopposed the global anti-federal government organizational sentiments are gradually spreading among the space colonies. This is the story of one boy Kamille Bidan.

Alternative

novel
The year is Universal Century 0087. Seven years have passed since the end of the One Year War. In its zeal to stamp out any remaining opposition, the Earth Federation has organized the Titans, an elite fighting force. However, the Titans soon get out of hand, committing atrocities on par with the worst the Principality of Zeon had to offer during the war. In response, dissatisfied citizens, former Zeon soldiers, and even members of the Earth Federal Forces form a resistance group known as the Anti-Earth Union Group, or AEUG. As the next war is brewing, a small AEUG group arrives at Side 7 to investigate the new Gundam Mk. II... 

(Source: Anime News Network)