Infantry Drills

5-139: Perimeter Defense

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5-139. When operating independently, the platoon uses a perimeter defense during extended halts, resupply, and issuing platoon orders or lulls in combat. Normally the unit first occupies a short halt formation. Then after conducting a leader’s reconnaissance of the position and establishing security, the unit moves into the perimeter defense.

Next: 5-140: Mounted Security Halt

Go Back To: U.S. Army FM 3-21.8: The Infantry Rifle Platoon and Squad