Which of the following are considered the three major elements of sustainment?

The three major elements of sustainment, as outlined in Army Doctrine Publication (ADP) 4-0, are logistics, personnel services, and health services.

Logistics encompasses the planning and execution of the movement and support of forces, ensuring that units are supplied with the necessary resources, equipment, and maintenance support to operate effectively. Personnel services focus on providing support to the soldiers and their families, including personnel accountability, pay, and legal services, which are vital for maintaining morale and operational readiness. Health services involve the medical support provided to soldiers, encompassing care, evacuation, and rehabilitation, which are crucial for sustaining the fighting capability of the force.

This understanding emphasizes the integral relationships among these elements, as effective sustainment relies on the interdependence and interaction of logistics, personnel services, and health services to ensure that military operations can be conducted successfully and continuously.