7-225. An encirclement can completely destroy the enemy. A corps or division commander may see possibilities for cutting off and encircling enemy elements during the exploitation of successful penetrations into the enemy’s rear. However, that commander must not initiate an encirclement prematurely or divert from more important missions. To encircle an enemy force, the pursuing force must overtake the retreating enemy and block the enemy’s escape. Strong forces should position themselves to block enemy breakthrough attempts. Air assault forces supported by attack helicopters, armed UASs, and joint fires can perform this mission. Once the enemy is encircled, the corps and division main and supporting efforts may become the reduction of the encircled forces.