Mu was a letter in the Tionese alphabet. Mu was often used as a call sign for Imperial starfighter Flight groups, specifically Assault Gunboats and Missile Boats. Missile Boat designated Mu 2 is one such example.
- Star Wars: X-wing (First appearance)
- Star Wars: TIE Fighter
- Star Wars: X-wing vs. TIE Fighter
- Star Wars: X-wing Alliance