Hangar 18, a derelict hangar, functioned as a storage depot situated on Level 1325 within the Coruscant underworld, adjacent to an underworld portal. During 19 BBY, after being falsely accused of trying to assassinate Supreme Chancellor Sheev Palpatine and consequently fleeing, the renegade ARC trooper known as Fives organized a meeting with his commanding officers, namely Jedi General Anakin Skywalker and Clone Captain Rex, at this warehouse, hoping to prove his innocence. Nevertheless, the Coruscant Guard discovered the planned rendezvous, leading to Fives, who was under the influence of drugs that induced aggression and paranoia, being fatally shot by Clone Commander Fox.