United States Armed Forces

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United States Armed Forces
Seals of the United States Armed Forces.png
The seals of the five service branches of the U.S. Armed Forces
Founded14 June 1775; 243 years ago (1775-06-14)[N 1]
Service branches United States Army
 United States Marine Corps
 United States Navy
 United States Air Force
 United States Coast Guard
HeadquartersThe Pentagon, Arlington County, Virginia, U.S.
Commander-in-Chief President Donald Trump
Secretary of Defense James Mattis
Secretary of Homeland Security Kirstjen Nielsen
Chairman of the Joint Chiefs of Staff

Gen Joseph Dunford, USMC

Vice Chairman of the Joint Chiefs of Staff Gen Paul J. Selva, USAF
Senior Enlisted Advisor to the Chairman CSM John W. Troxell, USA
Military age17 with parental consent, 18 for voluntary service. Maximum age for first-time enlistment is 35 for the Army,[1] 28 for the Marine Corps, 34 for the Navy, 39 for the Air Force[2] and 27 for the Coast Guard.[3]
Active personnel1,281,900[4] (ranked 3rd)
Reserve personnel811,000[4]
BudgetUS$610 billion (2017)[5] (ranked 1st)
Percent of GDP3.1% (2017)[5]
Domestic suppliersList
Related articles

Military history of the United States



Marine Corps


Air Force

Coast Guard

The United States Armed Forces[6] are the military forces of the United States of America. It consists of the Army, Marine Corps, Navy, Air Force, and Coast Guard.[7] The President of the United States is the Commander-in-Chief of the U.S. Armed Forces and forms military policy with the U.S. Department of Defense (DoD) and U.S. Department of Homeland Security (DHS), both federal executive departments, acting as the principal organs by which military policy is carried out. All five armed services are among the seven uniformed services of the United States.[8]

From the time of its inception, the U.S. Armed Forces played a decisive role in the history of the United States. A sense of national unity and identity was forged as a result of victory in the First Barbary War and the Second Barbary War. Even so, the founders of the United States were suspicious of a permanent military force. It played a critical role in the American Civil War, continuing to serve as the armed forces of the United States, although a number of its officers resigned to join the military of the Confederate States. The National Security Act of 1947, adopted following World War II and during the Cold War's onset, created the modern U.S.