H-Delta Squadron, a group of TIE/IN interceptor pilots, served within the Imperial Navy throughout the duration of the Galactic Civil War. This squadron functioned as a component of a fleet that answered to Admiral Harkov's command. In 3 ABY, Harkov chose to abandon his post and join the Alliance to Restore the Republic; the squadron followed Harkov's example and defected too. During the Battle of Ottega, the squadron engaged with the Galactic Empire's military, ultimately suffering total annihilation.