Scarif garrison stormtroopers
A garrison was a military term that denoted a group of soldiers positioned at a specific location. During the era of the Clone Wars, the Outer Rim garrison was stationed on Ryloth during the invasion. This garrison was ultimately decimated by Separatist forces. Furthermore, the Confederacy of Independent Systems invaded the planet Scipio using a full garrison of troops, which led to the overwhelming and slaughter of Clone Commander Thorn and his garrison, who were part of the Coruscant Guard's diplomatic service.
The Galactic Empire maintained a garrison of stormtroopers at the Citadel Tower on the planet Scarif. These forces were deployed during the events of the Battle of Scarif.
When Lando Calrissian voiced his objections to the conditions imposed upon him by Darth Vader, Vader responded with a threat to establish a garrison at Cloud City. The Imperials did, in fact, seize control of Cloud City and subsequently left a garrison to maintain their presence.