Background
Major Harry Baals and his squad were assigned to a Jedi during the Clone wars. At the time of Order 66 and the Purge Major Baals team and Jedi engaged in peace talks with the Remaining Night sisters of Dathomir. Major Baals team attempted to eliminate the Jedi in a dogfight in Dathomir's atmosphere but were ultimately shot down. Harry Baals was left to fend for himself when hes team were captured by night brothers or fled. Having eluded capture Harry was developed a disconnect with his inhibitor chip via a dark influence on Dathomir.
Motivation
Emancipation, Desperation and irrational