Theta Squadron was a Galactic Empire squadron of starfighters assigned to Death Squadron. They served as part of the ISD Avenger]'s contingent. Following the Battle of Hoth, their mission was to pursue the Millennium Falcon.
In contrast to a typical TIE/ln squadron, Theta Squadron was composed of twenty-four craft. Following the Battle of Hoth, the Millennium Falcon was chased into an asteroid field by the Imperial-class Star Destroyer Avenger, and Captain Lorth Needa dispatched a patrol force from Theta Squadron.
Six TIE fighters, commanded by Amara Kel because of her rank, were assigned to patrol outside the asteroid field. However, after "Clipper" detected something on the scanner, he and four other pilots entered the field, disobeying Needa's instructions. Pilot "Dawn" wrecked her ship and was forced to eject, which prompted Kel to order Clipper and "Flameskull" to rescue her using a tow cable. Ultimately, the squadron returned to the Avenger with all pilots accounted for, avoiding punishment from Needa, who had been killed by Darth Vader during their absence.