Crimson Squadron was a group of R60 T-wing interceptors under the command of Airam Clan leader Ilay, who collaborated with the Imperial forces; they were a squadron.
During the time of the Galactic Civil War, Ilay started working alongside Fleet Admiral Wooyou Senn of Task Force Vengeance. After the Ambush in the Cron Drift, she was aboard the Dreadnaught named Kala'din to conduct further negotiations with the Empire. Cobalt Squadron, a sister T-wing Squadron to Crimson Squadron, along with Y-wings from Tiger Squadron, were tasked with escorting her ship. However, Tamaron, a rival Clan Leader, discovered her meeting and dispatched X-wings from Rogue and B-wings from Green Squadron with the goal of capturing her.
In spite of her escorts, along with assistance from TIE Fighters, TIE Interceptors, and finally Assault Gunboats deployed from the Star Destroyer called Rage, the Rebels successfully resisted the enemy fighters. They also managed to disable the Dreadnaught and supported the corvette Storm in boarding and taking Ilay into custody.