- "Sigma Squadron stands ready, awaiting your command."
- ―Sarn to Darth Vader
Sigma Squadron was a starfighter squadron of the Imperial Navy that was equipped with TIE Phantoms. To demonstrate the new starfighters' effectiveness to Darth Vader, Admiral Sarn deployed Sigma Squadron against a Rebel Alliance patrol in the Dreighton Triangle. All three Rebel fighters were destroyed and the TIEs sustained no casualties.
- Star Wars: Rebel Assault II: The Hidden Empire (First appearance)