Which Army warfighting function is concerned with the integrity and security of units and personnel?

The correct answer is Protection. This warfighting function focuses on the preservation of the force through measures designed to safeguard personnel, equipment, and critical infrastructure from threats such as enemy actions and environmental hazards. Protection encompasses a wide range of activities, including personnel safety, force health protection, and defensive measures to ensure that units can operate effectively and maintain their operational readiness.

Protection is crucial because it ensures that units can carry out their missions without suffering unacceptable losses. This includes actions such as implementing physical security measures, conducting risk assessments, and establishing defensive operations. By prioritizing the integrity and security of units and personnel, leaders can enable their forces to engage in offensive and stability operations with greater confidence and effectiveness.

In contrast, Movement and Maneuver deals primarily with the movement of forces in relation to enemy forces and terrain, Intelligence focuses on understanding the operational environment and enemy capabilities to inform decision-making, while Sustainment ensures that forces have the necessary resources—such as food, fuel, and ammunition—to maintain operations. Each of these functions plays an important role in overall military effectiveness, but Protection specifically addresses the need to secure and preserve the force itself.