a body of troops stationed in a fortified place.

the place where such troops are stationed.

any military post, esp. a permanent one.

to provide (a fort, town, etc.) with a garrison.

to occupy (a fort, post, station, etc.) with troops.

to put (troops) on duty in a fort, post, station, etc.

noun

barracks , base , camp , citadel , command post , encampment , fortification , fortress , stronghold , fort , post , regiment , secure , station , troops