United States Armed Forces

United States Armed Forces
Name	United States Armed Forces
Caption	Seal of the U.S. Department of Defense
Headquarters	The Pentagon, Arlington County, Virginia
Commander-in-chief	President of the United States
Secretary	United States Secretary of Defense
Chief of staff	Chairman of the Joint Chiefs of Staff
Age	17 with parental consent, 18 for voluntary service
Conscription	No (authorized under Selective Service System)
Active	~1,328,000 (2024)
Reserve	~799,500 (2024)
Deployed	~165,000 (in over 150 countries)
Budget	$842 billion (FY2024)
Percent GDP	3.1% (2024)
Founded	14 June 1775 (as the Continental Army)
Branches	United States Army, United States Marine Corps, United States Navy, United States Air Force, United States Space Force, United States Coast Guard (during wartime)
Website	defense.gov

United States Armed Forces. The military forces of the United States, consisting of six service branches, operate under the civilian leadership of the President of the United States as commander-in-chief and the United States Department of Defense. Tracing its origins to the Continental Army founded in 1775 during the American Revolutionary War, it has grown into one of the world's most technologically advanced and powerful militaries. Its global network of bases, forward-deployed forces, and rapid deployment capabilities underpin a strategy of deterrence and power projection, with ongoing operations spanning from the Indo-Pacific Command to United States European Command.

History

The foundational conflict was the American Revolutionary War, which saw the creation of the Continental Navy and Continental Marines alongside the army. Key early figures included George Washington and the Marquis de Lafayette. The War of 1812 tested the young nation's defenses, notably at the Battle of New Orleans. The American Civil War was a transformative catastrophe, introducing industrial warfare and seeing leadership from generals like Ulysses S. Grant and Robert E. Lee. The 20th century defined its global role, through World War I, the monumental efforts in World War II across theaters like the Pacific War and Normandy landings, the Cold War standoff exemplified by the Cuban Missile Crisis and Vietnam War, and the post-9/11 era of conflicts in Afghanistan and Iraq.

Organization and structure

The chain of runs from the President of the United States through the United States Secretary of Defense to the Chairman of the Joint Chiefs of Staff. The principal combatant commands, such as United States Central Command and United States Indo-Pacific Command, execute missions globally. The six service branches are the United States Army, United States Marine Corps, United States Navy, United States Air Force, United States Space Force, and the United States Coast Guard, which reports to the United States Department of Homeland Security except during wartime. Key supporting agencies include the Defense Intelligence Agency and the National Security Agency.

Personnel

All service members swear an oath to support and defend the Constitution of the United States. Recruitment is voluntary, managed by entities like the United States Army Recruiting Command. Training occurs at iconic installations such as Fort Benning for the Army, Marine Corps Recruit Depot Parris Island, and the United States Naval Academy. The senior enlisted advisor is the Senior Enlisted Advisor to the Chairman. Notable personnel figures have included generals Douglas MacArthur and Colin Powell, and admirals Chester W. Nimitz and William H. McRaven.

Equipment and technology

The inventory includes iconic platforms like the M1 Abrams tank, Nimitz-class aircraft carrier, Ohio-class submarine, and F-35 Lightning II fighter. Strategic capabilities are anchored by the nuclear triad of B-2 Spirit bombers, Minuteman III missiles, and Trident missile-armed submarines. Major developers are corporations like Lockheed Martin, Northrop Grumman, and General Dynamics. Cutting-edge research is conducted by the Defense Advanced Research Projects Agency, pioneering areas from stealth technology seen in the F-117 Nighthawk to Global Positioning System networks.

Budget and expenditures

The budget is authorized annually by the United States Congress through the National Defense Authorization Act. For fiscal year 2024, it was approximately $842 billion, funding personnel, operations, procurement, and research. Major procurement programs include the Gerald R. Ford-class aircraft carrier and the Columbia-class submarine. Auditing and oversight are conducted by the Government Accountability Office and the Department of Defense Office of Inspector General. Spending significantly impacts the industrial base in states like California, Texas, and Virginia.

Global presence and operations

It maintains approximately 750 military facilities outside the fifty states, with major concentrations in Japan, Germany, and South Korea. Key strategic hubs include Ramstein Air Base and Guam. Current operations involve rotational deployments to Poland under Atlantic Resolve, maritime patrols in the South China Sea, and counter-terrorism missions in Africa Command. It is a leading member of the North Atlantic Treaty Organization and has security agreements with nations like Australia under AUKUS and Japan.

Culture and traditions

Core values are formally enshrined, such as the Army's "Loyalty, Duty, Respect, Selfless Service, Honor, Integrity, Personal Courage". Ceremonial highlights include the Army-Navy Game, the Marine Corps Birthday Ball, and change of command ceremonies. The Tomb of the Unknown Soldier at Arlington National Cemetery is a sacred site. Uniform items like the Marine Corps dress blue uniform and the Army Green Service Uniform carry deep heritage. The Medal of Honor is the nation's highest award for valor.