patrol

a regular walk or drive around an area by people who guard it and check that all is safe

A going of the rounds along the chain of sentinels and between the posts, by a guard, usually consisting of three or four men, to insure greater security from attacks on the outposts.

The guards who go the rounds for observation; a detachment whose duty it is to patrol.

The largest division of officers within a police department or sheriff's office, whose assignment is to patrol and respond to calls for service.

A movement, by a small body of troops beyond the line of outposts, to explore the country and gain intelligence of the enemy's whereabouts.

A unit of a troop, usually defined by certain ranks or age groups within the troop, and ideally comprised of six to eight members.

To go the rounds along a chain of sentinels; to traverse a police district or beat.

To go the rounds of, as a sentry, guard, or policeman