In 125 ABY, power beckoned him, and he became obsessed with old Sith Holocrons. Later that year, he was seduced by the Dark Side of the Force. Unlike the first Dark Jedi in 25,000 BBY, he only managed to convince one other Jedi to come with him, his apprentice, Fendir Yezz. They escaped, decimated the New Republic Memorial Statue and fled with the Salvation to Had Abbadon, where the old Separatist Bunker was. They reactivated the Battle Droid Army and were joined by Lord Sinister and Kendal Piett. Piett was made Admiral of the Separatist Fleet, and Sinister was made chief guard of Yaman. Fendir Yezz was made Supreme Commander of the Droid Army. Peace was shattered until the Battle of Coruscant. After a duel with a Jedi Council master, Yaman was killed.