Hangar 84G was a hangar bay onboard the first Death Star, in operation during the Galactic Civil War. This hangar was located in proximity to the battle station's Superlaser Fire Control Room and the detention blocks.
Hangar 84G became a battleground when a number of Rebel prisoners escaped from their cells on the Death Star and attempted to flee the battle station. A group of would-be escapees attacked Hangar 84G, hoping to steal a transport. However, the Imperials had deployed the 501st Legion in response to the prison break, and these elite troopers were able to successfully defend the hangar bay and their Sentinel-class landing craft. They also managed to secure the detention block where the riot originated. Finally The 501st moved deeper into the station, killing all the escapees and destroying their transport in Hangar 85G.
Hangar 84G was destroyed when the Death Star exploded during the Battle of Yavin.