Some residents began patrols of the town at night.

Biologists have begun weekly patrols to watch for dead prairie dogs.

These troops began regular patrols of the region both on the ground and in the air.

We doubled the perimeter guard, began patrols of the compound itself.

Before the end of the month, the 21st began flying patrols over the critical island base in support of ground operations.

In the meantime, some residents have begun nightly armed patrols.

It began patrols in December 1942 but was disbanded on 30 April 1943.

Last month the Army began patrols of the site, and helicopters fly over occasionally.

The next day the US began regular patrols at sea.

During the offensive, the group began patrols before daybreak, and kept up a constant barrage each day until after dark at night.