patrol >> pəˈtrəʊl
Definition: [noun] an expedition to keep watch over an area, especially by guards or police walking or driving around at regular intervals.
Example: we were ordered to investigate on a night patrol
Definition: [noun] a unit of six to eight Scouts or Guides forming part of a troop.
Example: break the Cubs into sixes and Scouts into patrols
Definition: [verb] keep watch over (an area) by regularly walking or travelling around it.
Example: the garrison had to patrol the streets to maintain order