- "I remember my first unit, the boys and I were sent to Onderon to bring peace to a troubled world."
- ―Alexsandr Kallus
During the reign of the Galactic Empire, Saw Gerrera mounted an insurgency on his home planet of Onderon. The planet was severely destabilized by the conflict, leading the Empire attempting to suppress the rebellion with through the deployment of units such as Agent Kallus' platoon as well as bombing rebel-held areas.
- Ultimate Star Wars (First mentioned)
- Star Wars: Absolutely Everything You Need to Know
- Star Wars: Rogue One: Rebel Dossier
- Star Wars: Rogue One: The Ultimate Visual Guide
- Dawn of Rebellion (Indirect mention only)