What is the next task your unit should accomplish after sentinels have been posted

S.A.F.E. is the acronym that identifies the tasks required to set up awell-prepared defense and stands for:SecurityOrganization of the ground begins as soon as individual members ofthe squad have been assigned sectors of fire. To prevent surpriseand to deny the enemy information concerning the plan of defense,post local security such as patrols, sentinels, and listening and