Prior to the on-set of the Third Imperial Civil War, Allister served the Fel Empire as Lord Commander of the Imperial Knights and the ace commander of Vanquish Squadron. He was also a close friend of Rei Hawk and lover of Lyla Skywalker, both of whom were major allies during his campaign to restore peace to the inner-galactic regions during the Core Wars. After the arrest and subsequent death of his father on Coruscant, Allister defected from the Order and formed the Imperial Reformist Movement then, after expelling the Emperor's forces from the deep core, founded the Arcturus Empire.