Squad 1138, comprised of five Imperial troopers, was stationed at the outpost located on Laertos. T'Charek Haathi and the special ops unit under her command laid a trap for the patrol, subsequently appropriating their personas and gear to gain access to the base.
The name Patrol 1138 appears as one of numerous allusions scattered across the Star Wars universe, referencing George Lucas' initial cinematic work, THX 1138.