In garrison

Related to In garrison: fortifying
in the condition of a garrison; doing duty in a fort or as one of a garrison.

See also: Garrison

References in classic literature ?
This done, Captain Bonneville made a distribution of his forces: twenty men were to remain with him in garrison to protect the property; the rest were organized into three brigades, and sent off in different directions, to subsist themselves by hunting the buffalo, until the snow should become too deep.
The Seventh Cavalry still in garrison, here; also the Ninth Dragoons, two artillery companies, and some infantry.