United States Department of Defense

Executive department of the federal government

The United States Department of Defense (DoD), also referred to as the Department of War (DoW), is an executive department of the United States federal government charged with coordinating and supervising the United States Armed Forces—the Army, Navy, Marines, Air Force, Space Force, and, for some purposes, the Coast Guard—and related functions and agencies. Headquartered at the Pentagon in Arlington County, Virginia, just outside Washington, D.C., the stated mission of the Department of Defense is "to provide the military forces needed to deter war and ensure our nation's security". The Department of Defense is headed by the secretary of defense, a cabinet-level official who reports directly to the president of the United States.

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