Infantry Drills

3-9: Operation In-Depth

Previous: 3-8: Maneuver

3-9. Simultaneous application of combat power throughout the area of operation improves the chances for success while minimizing friendly casualties. Quick, violent, and simultaneous action throughout the depth of the defender’s area of operation can hurt, confuse, and even paralyze an enemy force just as it is most exposed and vulnerable. Such actions weaken the enemy’s will and do not allow all early enemy successes to build the confidence of the enemy’s Soldiers and leaders. In-depth planning prevents the enemy from gaining momentum in the attack. Synchronization of decisive, shaping, and sustaining operations facilitates mission success.

Next: 3-10: Defensive Tasks

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