- "Squad four, report. Squad four do you copy?"
- ―An Imperial, attempting to contact squad four
Squad four was a squad in the Armed Forces of the Galactic Empire. During the Imperial Era, squad four was part of the Imperial garrison charged with the defense of Fortress Vader on Mustafar. During that time, squad four participated in the Battle of Fortress Vader against Mustafarians who attempted to repel the foreign forces. Eventually, squad four was overrun, and the entire garrison was wiped out.
- Darth Vader: Dark Lord of the Sith 24 (First mentioned)