United States Armed Forces

United States Armed Forces
Emblems of the U.S. Armed Forces service branches
Founded	14 June 1775; 249 years ago (1775-06-14)[a]
Service branches	U.S. Army  U.S. Marine Corps  U.S. Navy  U.S. Air Force  U.S. Space Force  U.S. Coast Guard
Headquarters	The Pentagon, Arlington County, Virginia
Website	defense.gov dhs.gov
Leadership
Commander-in-Chief	President Donald Trump
Secretary of Defense	Pete Hegseth
Secretary of Homeland Security	Kristi Noem
Chairman of the Joint Chiefs of Staff	Gen Dan Caine, USAF
Vice Chairman of the Joint Chiefs of Staff	ADM Christopher W. Grady, USN
Senior Enlisted Advisor to the Chairman	SEAC Troy E. Black, USMC
Personnel
Military age	17 with parental consent, 18 for voluntary service.[b]
Conscription	Only males register at age 18 (conscription inactive since 1973)
Available for military service	15 million (2021)[7], age 18–25
Active personnel	1,328,000[8] (ranked 3rd)
Reserve personnel	799,500[9]
Expenditure
Budget	$895 billion (2025)[10] (ranked 1st)
Percent of GDP	3.38% (2024)[11]
Industry
Domestic suppliers	List
Foreign suppliers	United Kingdom  Germany  Netherlands  France  Israel  Italy  Sweden  Australia  Japan  Jordan  Spain  Norway   Switzerland  Singapore  South Africa  Czech Republic  Canada  South Korea  Brazil  Bulgaria
Annual imports	US$652.6 million (2014–2022)[12]
Annual exports	US$28.50 billion (2014–2022)[12]
Related articles
History	Military history of the United States Warfare directory of the United States Conflicts involving the United States Battles involving the United States
Ranks	Commissioned officer Army officer Marine Corps officer Navy officer Air Force officer Space Force officer Coast Guard officer Warrant officer Army warrant officer Marine Corps warrant officer Navy warrant officer Air Force warrant officer Coast Guard warrant officer Enlisted Army enlisted Marine Corps enlisted Navy enlisted Air Force enlisted Space Force enlisted Coast Guard enlisted

The United States Armed Forces are the military forces of the United States.^[13] U.S. federal law names six armed forces: the Army, Marine Corps, Navy, Air Force, Space Force, and the Coast Guard.^[14] Since 1949, all of the armed forces, except the Coast Guard, have been permanently part of the United States Department of Defense. They form six of the eight uniformed services of the United States.

Each of the different military services is assigned a role and domain. The Army conducts land operations. The Navy and Marine Corps conduct maritime operations, the Marine Corps specializing in amphibious and maritime littoral operations primarily for supporting the Navy. The Air Force conducts air operations. The Space Force conducts space operations. The Coast Guard is unique in that it specializes in maritime operations and is also a law enforcement agency.^[15][16]

From their inception during the American Revolutionary War, the Army and the Navy, and later the other services, have played a decisive role in the country's history. They helped forge a sense of national unity and identity through victories in the early-19th-century First and Second Barbary Wars. They played a critical role in the territorial evolution of the U.S., including the American Civil War. The National Security Act of 1947 created the Department of Defense or DoD, after a short period being called the National Military Establishment) headed by the secretary of defense, superior to the service secretaries. It also created both the U.S. Air Force and National Security Council; in 1949, an amendment to the act merged the cabinet-level departments of the Army, Navy, and Air Force into the DoD.^[17]

The president of the U.S. is the commander-in-chief of the armed forces and forms military policy with the DoD and Department of Homeland Security (DHS), both federal executive departments, acting as the principal organs by which military policy is carried out.

The personnel size of the six armed forces together ranks them among the world's largest state armed forces. They draw their personnel from a large pool of professional volunteers. The U.S. has used military conscription, but not since 1973. The Selective Service System retains the power to conscript males, requiring the registration of all male citizens and residents of the U.S. between the ages of 18 and 25.

The U.S. Armed Forces are considered the world's most powerful military, especially since the end of the Cold War.^[18] The military expenditure of the U.S. was US$916 billion in 2023, the highest in the world, accounting for 37% of the world's defense expenditures.^[19] The U.S. Armed Forces has significant capabilities in both defense and power projection due to its large budget, resulting in advanced and powerful technologies which enable widespread deployment of the force around the world, including around 800 military bases outside the U.S.^[20]

The U.S. Air Force is the world's largest air force, followed by the U.S. Army Aviation Branch. The U.S. Naval Air Forces is the fourth-largest air arm in the world and is the largest naval aviation service, while U.S. Marine Corps Aviation is the world's seventh-largest air arm. The U.S. Navy is the world's largest navy by tonnage.^[21] The U.S. Coast Guard is the world's 12th-largest maritime force.^[22]

Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).