- "Controller, an unauthorized droid has just entered the ISB base on Killun 71."
- ―An Imperial technician
Killun Station was an Imperial Security Bureau outpost built onto one of the misty moon Killun 71's jagged landmasses. Since it held sensitive data including Imperial clearance codes, the station was tightly guarded. Stormtroopers were posted at all entrances and all visiting personnel and droids had to pass through identification scanners.
In 2 BBY, Killun Station was breached by the rebel droids AP-5 and Chopper during a mission to steal clearance codes for the Phoenix Squadron's upcoming raid on Lothal. While AP-5 managed to steal the clearance codes, Chopper was remotely reprogammed by a team of Imperial intelligence officers led by LT-319, who was based aboard an IGV-55 surveillance vessel.