The Pentagon | DOD

🇺🇸 The Department of Defense (DoD) The Department of Defense (DoD) is the executive branch agency headquartered at the Pentagon, responsible for coordinating and supervising all functions of the U.S. national security and armed forces. 🪖 Military Branches * Department of the Army: U.S. Army & Army National Guard (Land operations) * Department of the Navy: U.S. Navy & U.S. Marine Corps (Naval & amphibious operations) * Department of the Air Force: U.S. Air Force & U.S. Space Force (Air, space, & cyber operations) 🏛️ Key Leadership * Secretary of Defense (SecDef): The civilian head of the department appointed by the President. * Chairman of the Joint Chiefs of Staff (CJCS): The highest-ranking military officer and principal military advisor.