Infantry Drills

3-64: Supplementary Position

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3-64. A supplementary position is a defensive position located within a unit’s assigned area of operation providing sectors of fire and defensible terrain along an avenue of approach not the enemy’s expected avenue of attack. (See figure 3-7.) For example, an avenue of approach into a company’s area of operation from one of its flanks could require the company to direct its platoons to establish supplementary positions to allow the platoons to engage enemy forces traveling along an avenue. The platoon leader formally assigns supplementary positions when the platoon must cover more than one avenue of approach.

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