United States military
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| United States military | |
|---|---|
| Name | United States military |
| Founded | 1775 |
| Headquarters | The Pentagon |
| Commander in chief | President of the United States |
| Secretary of defense | United States Secretary of Defense |
| Active personnel | ~1.3 million |
| Reserve personnel | ~800,000 |
| Manpower age | 17–45 |
| Military expenditures | largest in world |
United States military is the collective uniformed services charged with national defense, power projection, and support to United States national interests across global theaters. It evolved from colonial forces into a global force with permanent forward basing, nuclear deterrence, and expeditionary capabilities, interacting with international organizations and alliances. Its institutions intersect with executive offices, legislative committees, and judicial review, shaping doctrine, acquisition, and force posture.
History
Origins trace to the Continental Army and Continental Navy raised during the American Revolutionary War, with figures such as George Washington and institutions like the Second Continental Congress pivotal to formation. The post-independence era saw conflicts including the War of 1812, the Mexican–American War, and the American Civil War that tested organization, logistics, and industrial mobilization under leaders such as Abraham Lincoln and Ulysses S. Grant. Overseas engagement increased after the Spanish–American War and through interventions in Philippine–American War and the Banana Wars, while the two World War I and World War II transformed strategic posture, with collaboration with Allies of World War II, leaders like Franklin D. Roosevelt and Dwight D. Eisenhower, and campaigns from Normandy landings to the Pacific War. The Cold War era produced institutions such as NATO, strategic triad deployments including ICBM forces and Strategic Air Command, and proxy conflicts such as the Korean War and Vietnam War. Post-Cold War operations from Operation Desert Storm through interventions in Kosovo War, War in Afghanistan (2001–2021), and the Iraq War reflect expeditionary logistics, counterinsurgency doctrine, and interagency coordination.
Organization and Command Structure
Civilian control centers on the President of the United States as commander-in-chief and the United States Secretary of Defense overseeing the Department of Defense. The Joint Chiefs of Staff provide military advice, while unified combatant commands such as United States Central Command, United States Indo-Pacific Command, and United States European Command exercise operational authority. Service secretaries and chiefs—e.g., Secretary of the Navy, Chief of Staff of the Army—manage administrative functions, training institutions like the United States Military Academy, United States Naval Academy, and United States Air Force Academy, and commands including the United States Cyber Command and United States Space Command. Legislative oversight by committees such as the United States Senate Committee on Armed Services and statutes including the National Security Act of 1947 shape structure and authorities.
Components and Services
The principal services comprise the United States Army, United States Navy, United States Marine Corps, United States Air Force, and United States Space Force, with the United States Coast Guard operating under the Department of Homeland Security in peacetime and transferable to Department of the Navy during war. Reserve components include the United States Army Reserve, United States Navy Reserve, and Air National Guard, with state-level coordination through National Guard of the United States. Specialized agencies such as the Defense Intelligence Agency, National Geospatial-Intelligence Agency, and Missile Defense Agency provide intelligence, reconnaissance, and capabilities integration.
Personnel and Conscription
Personnel policies encompass recruitment, retention, and professional military education at institutions like the National Defense University and United States Army War College. Notable personnel systems include the Selective Service System registration, which preserves a framework for conscription though no active draft has occurred since the Vietnam War era; legal frameworks such as the Uniform Code of Military Justice govern discipline. Benefits and career paths intersect with veterans’ programs under the United States Department of Veterans Affairs and awards including the Medal of Honor and Distinguished Service Cross.
Budget and Procurement
Budgeting is governed by annual authorization and appropriation through the United States Congress, with the Department of Defense receiving the largest discretionary appropriation. Major procurement programs include platforms like the F-35 Lightning II, Columbia-class submarine, Arleigh Burke-class destroyer, and the Virginia-class submarine, managed through authorities such as the Defense Acquisition System. Oversight bodies include the Government Accountability Office and the Defense Contract Audit Agency, and laws such as the Buy American Act and Arms Export Control Act affect industrial base and foreign military sales programs.
Operations and Deployments
Operational activity ranges from peacetime presence missions with forward bases in locations such as Guantanamo Bay Naval Base and Ramstein Air Base to contingency operations conducted under authorities like Authorization for Use of Military Force resolutions. Cooperative security and exercises include partnerships with Japan Self-Defense Forces, Republic of Korea Armed Forces, and NATO allies such as the United Kingdom Armed Forces and French Armed Forces. Humanitarian assistance and disaster response have been provided during events including Hurricane Katrina and earthquake relief operations, while counterterrorism efforts have targeted groups such as Al-Qaeda and ISIS.
Capabilities and Modernization
Capabilities span conventional forces, nuclear deterrents maintained under joint arrangements like United States Strategic Command, cyber operations via United States Cyber Command, space operations under United States Space Command, and special operations by units such as United States Special Operations Command and Navy SEALs. Modernization priorities emphasize hypersonics, artificial intelligence research at institutions like DARPA, advanced propulsion, and resilient logistics, as seen in programs including the Next-Generation Air Dominance initiative and investments in unmanned systems. Industrial partnerships with firms and agencies, and policy frameworks like the National Defense Strategy, guide transition to future force structures.