During the two years following the 'Bunch 30 Incident', the corrupt Titans began their own line of mobile suits. Among the Titans' first line of production mobile suits were three prototype Gundam Mark IIs, loosely based on the legendary Gundam of the One Year War. When word of these 'black Gundams' reached the Anti-Earth Union Group, a team of Rick Dias led by Quattro Bajeena (Principality of Zeon's infamous "Red Comet"), infiltrated the Titans' Gryps space colony. With the help of a young boy, Camille Bidan , Quattro managed to steal all three mobile suits. Following the theft of the Gundams, two were sent to Anaheim Electronics to be studied, while the AEUG kept one in its service, painting over the dark-blue Titans' colour and giving it a blue on white colour-scheme.

The Gundam Mark II was given to many of the AEUG's best pilots, including the young rookie Camille Bidan . The Gundam Mark II soon proved ineffective against many of the Titans' new and transformable mobile suits.