Patrol
PATROL
PATROLL,noun
1. In war, a round; a walking or marching round by a guard in the night, to watch and observe what passes, and to secure the peace and safety of a camp or other place.
2. The guard or persons who go the rounds for observation; a detachment whose duty is to patroll.
In France, there is an army of patrols to secure her fiscal regulations.
PATROLL, verb intransitive To go the rounds in a camp or garrison; to march about and observe what passes; as a guard.