The 4th Sector Army was a Sector Army in the Grand Army of the Republic during the Clone Wars. The 21st Nova Corps, led by Clone Marshal Commander CC-1138 "Bacara," was part of the 4th Sector Army.
- Star Wars: The Prequel Trilogy – A Graphic Novel
- Star Wars: The Clone Wars – "Old Friends Not Forgotten" (Appears in hologram) (Appears in flashback(s))
- Star Wars: Episode III Revenge of the Sith (First appearance)
- Kanan 2 (Vision to Caleb Dume)
- Galaxy's Edge 2 (Appears in flashback(s))
- Star Wars: Force Collection (Card: Bacara (★★★★) (link)) (First identified as 4th Sector Army)
- Star Wars Helmet Collection 15