Avenger Squadron was an elite Imperial Starfleet starfighter unit led by E.C. "Easy" Nerwal. They were assigned to Task Force Vengeance on its quest to pacify the Airam sector. Unlike regular Imperial starfighter squadrons, Avenger Squadron was permitted to modify their TIE craft with advanced and expensive gadgets previously deployed only by Grand Admiral Demetrius Zaarin's experimental test units. This extra equipment included deflector shields, beam weapons—including jamming, tractor and decoy beams—and extra missile racks for increased warhead payload. However, except for the shields, those upgrades were only made available if and when the mission at hand called for a specific upgrade.