During large-scale combat operations, which level is described as the army's principal tactical warfighting function?

• A. Divisions
• B. Corps
• C. Brigade Combat Team
• D. Sustainment

Answer: (A)

In large-scale combat operations, the division is the level that best embodies the Army’s ability to integrate and synchronize all the warfighting functions on the battlefield. A division commands several brigades and brings together maneuver, fires, intelligence, protection, sustainment, and mission command in a cohesive, maneuver-centric formation. This makes it the primary tactical warfighting unit capable of conducting and sustaining combined arms operations across a substantial area, while still being able to operate with a degree of autonomy and adaptability.

Brigade Combat Teams are the building blocks under a division; they execute tasks but rely on the division for the full integration and mass of capabilities. A corps operates at a higher, more operational level, coordinating multiple divisions and broader campaigns, not the tactical level where the Army conducts integrated, day-to-day combat actions. Sustainment is one of the warfighting functions, describing the support activities that enable the fight, not a level of organization.

So the division is described as the Army’s principal tactical warfighting function because it is the echelon designed to integrate and execute combined arms at the tactical level across a meaningful operational footprint.