Bellassa was a thriving, peaceful world during the final days of the Republic. The planet's capital was Ussa, a pleasant city with seven large, tranquil lakes. After the rise of the Galactic Empire, Obi-Wan Kenobi went to Bellassa after learning on Tatooine that one former Jedi survived the purge: Ferus Olin.
- "Yeah, well, they had some trouble on Bellassa. Stubborn, those beings are. All the citizens took to the streets. There were mass arrests in every city. I think they must have arrested half of Ussa. I'm telling you, this is the start of something big."
- ―A pilot
At the beginning of the Clone Wars, the natives committed their army to fight alongside the clone troopers. After the overthrow of the Republic and the birth of the Empire, the governor was deposed and an Imperial garrison was established. While the planet's Senate maintained control in theory, Inquisitor Malorum became the de-facto head of the local government when the Empire came to power. He called for the execution of Order 37 to force the local population to turn in Ferus Olin by arresting a large number of civilians in Ussa, and threatened to execute them if Olin was not turned into Imperial custody. He hired Boba Fett to kill Obi-Wan Kenobi and the then weak, Ferus Olin. The two managed to escape along with Trever Flume, a street kid who came along on their adventures. Later, Bellassa's economy began weakening, and the Empire hired scientists and constructed factories—presumably to manufacture Bellassa's famous cloth. However, Ferus Olin, now an agent for the Emperor, although in reality a double agent, discovered the Empire was illegally creating weapons. This further fueled the resistance that sprung up during the Imperial rule.
- (Mentioned only)
- The Last of the Jedi: The Desperate Mission (First appearance)
- The Last of the Jedi: Dark Warning (Mentioned only)
- "Ghosts of the Sith"—Star Wars Insider 88 (Mentioned only)
- The Last of the Jedi: Underworld (Mentioned only)
- The Last of the Jedi: Death on Naboo (Mentioned only)
- The Last of the Jedi: A Tangled Web
- The Last of the Jedi: Return of the Dark Side (Mentioned only)
- The Last of the Jedi: Secret Weapon
- The Last of the Jedi: Against the Empire
- The Last of the Jedi: Master of Deception (Mentioned only)
- The Last of the Jedi: Reckoning (Mentioned only)
- Rebel Force: Trapped (Mentioned only)
- The Complete Star Wars Encyclopedia
- The Essential Atlas
- The Essential Reader's Companion
- Star Wars: Edge of the Empire Core Rulebook
- Star Wars: The Card Game – Darkness and Light (Card: Asteroid Base)