During the Great Galactic War, much of the Arm was conquered by the resurgent Sith Empire early on in the war. The Galactic Republic did not make an effort to retake it. Thousands of years later, during the Sith-Imperial War in 130 ABY, a Kaleesh general named Nyax jal Sk'ar conquered most of the Arm for the Fel Empire and cleared it of Galactic Federation of Free Alliances holdouts.