Department of Defense (DoD) Directory » Organizations

The Department of Defense was created after the consolidation of the national defense structure. Originally named The National Military Establishment, the Department of Defense provides military forces with the sources needed to deter war and protect the country. 

The Military Health System (MHS) is a partnership of medical educators, medical researchersand healthcare providers who ensure delivery of care to all DoD service members, retireesand their families. It’s a source of education, medical training, research, technology, and policy. The organization consists of the Office of the Assistant Secretary of Defense for Health Affairs; the medical departments of the Army, Navy, Air Forceand Joint Chiefs of Staff; the Combatant Command surgeons; and the TRICARE providers.