A recruitment base that was mobile, utilizing a GR-75 medium transport, was used by the Alliance to Restore the Republic throughout the duration of the Galactic Civil War. This base became known to the Galactic Empire because several defecting members of their forces were sent there; however, its mobile nature and precise location remained a mystery to them. The Imperial Security Bureau later found out that Zin Graw, who was a TIE fighter pilot within the 204th Imperial Fighter Wing, was planning to defect to the Rebellion. Even though Graw had already died during an earlier mission, the Empire exploited the time and coordinates she had received to initiate an attack against the base. As the base was exiting hyperspace, Squadron Five from the 204th, along with TIE bombers, launched a surprise attack, successfully destroying both the base itself and the X-wing starfighters dispatched for its defense.