Lost War Chronicles
For the sake of his wife and child left behind on the colony, he has been traveling around the war zone as a Foreign Legionnaire since the beginning of the One Year War. In the novel version, he developed a friendship with Larry Radley that transcended friend and foe, and after the One Year War, he even entrusted him with a letter to his wife and child describing his recent situation. In the manga version, there is no mention of his wife and child.
In U.C. 0084, he belongs to the Republic of Zeon after the One Year War, and is promoted to the rank of Captain. He pilots a high-mobility type Gelgoog, and engages in a battle with a Silver Lance unit driven by Lilia Flaubert, together with Ford Romfellow, a pilot of the Titans who offered his cooperation even though he violated his orders. He seems to have known that Jake Guns was fighting as a Zeon remnant.