The Galactic Civil War saw the Galactic Empire maintain a garrison on Obumubo, a moon with a sea. The troops protecting this garrison accumulated months of valuable experience fending off the native sea creatures of the moon. In 3 ABY, the Rebel Alliance's 61st Mobile Infantry deployed to Obumubo with the objective of destroying the Imperial garrison so that someone stationed on the planet of Kuat could be promoted to fill the resulting position. Initially, the Obumubo garrison possessed a tactical edge due to their accumulated combat experience. However, after a mere two days of intense fighting, the 61st successfully constructed siege weaponry, leading to the garrison's downfall.
The Imperial garrison's presence was first established within Battlefront: Twilight Company, a novel penned by Alexander Freed in 2015.