commander-in-chief secretary of defense Joint Chiefs of Staff Department of Defense the Pentagon Army Marine Corps Navy Air Force Space Force Coast Guard Department of Homeland Security Department of the Navy more than 40% of the world's nuclear weapons Washington largest GDP Russia second-largest President military Washington, D.C.
The President is the commander-in-chief of the United States Armed Forces and appoints its leaders, the secretary of defense and the Joint Chiefs of Staff. The Department of Defense, which is headquartered at the Pentagon near Washington, D.C., administers five of the six service branches, which are made up of the Army, Marine Corps, Navy, Air Force, and Space Force. The Coast Guard is administered by the Department of Homeland Security in peacetime and can be transferred to the Department of the Navy in wartime. The United States spent $877 billion on its military in 2022, 39% of global military spending, accounting for 3.5% of the country's GDP. The U.S. has more than 40% of the world's nuclear weapons, the second-largest amount after Russia.
