United States Army (USA)
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| United States Army (USA) | |
|---|---|
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| Unit name | United States Army |
| Native name | U.S. Army |
| Caption | Flag of the United States Army |
| Country | United States |
| Type | Land force |
| Branch | United States Armed Forces |
| Dates | 14 June 1775–present |
| Garrison | The Pentagon |
| Garrison label | Headquarters |
| Motto | This We'll Defend |
| Website | Official website |
United States Army (USA) is the principal land warfare service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It traces institutional lineage to the Continental Army raised during the American Revolutionary War and has participated in major conflicts including the War of 1812, the American Civil War, the Spanish–American War, World War I, World War II, the Korean War, the Vietnam War, the Gulf War, the War in Afghanistan (2001–2021), and the Iraq War. The Army organizes, trains, and equips forces for expeditionary operations, homeland defense, and stability missions in coordination with the Department of Defense, the United States Congress, and allied militaries such as North Atlantic Treaty Organization members.
History
The Army's origins lie with the Continental Army created by the Second Continental Congress to oppose British Empire forces during the American Revolutionary War. Post-independence, the Militia Act of 1792 and campaigns against Indigenous nations shaped early force structure in the Frontier and Indian Wars. The Army expanded during the Mexican–American War and underwent professionalization after the Civil War with institutions like West Point and the United States Military Academy. Industrialized warfare in World War I and World War II transformed doctrine, logistics, and combined arms concepts, influenced by figures such as John J. Pershing and George S. Patton. Cold War commitments led to deployments to Korea and NATO garrisons in Germany, while counterinsurgency in Vietnam prompted doctrinal debates. Post-Cold War engagements include operations in Panama, Somalia, Kosovo, and large-scale campaigns during the Gulf War and the Global War on Terrorism.
Organization and Structure
The Army is organized into components: the Regular Army, the Army National Guard, and the United States Army Reserve. Operational units are structured into formations such as squad, platoon, company, battalion, brigade combat team, division, and corps, with theater commands under United States Army Europe and United States Army Pacific. Headquarters functions are conducted at Department of the Army offices in The Pentagon and staff elements like Army Staff (United States Army). Institutional institutions include United States Army Training and Doctrine Command, United States Army Materiel Command, and United States Army Forces Command. Senior leadership comprises the Secretary of the Army, the Chief of Staff of the Army, and the United States Army Sergeants Major Academy for enlisted senior advisors.
Roles and Missions
Statutory roles derive from the National Security Act framework and directives from the President of the United States and Secretary of Defense. Missions cover forcible entry, power projection, deterrence under North Atlantic Treaty Organization obligations, homeland defense alongside Department of Homeland Security partners, and support to civil authorities during disasters such as responses to Hurricane Katrina. The Army conducts strategic engagement through exercises like DEFENDER-Europe and partnerships with allied forces including British Army, Canadian Army, and Japan Ground Self-Defense Force units.
Personnel and Training
Recruitment and professional education occur through programs at United States Military Academy, Officer Candidate School (United States Army), and Reserve Officers' Training Corps. Enlisted training is provided at installations such as Fort Benning, Fort Jackson, and Fort Leonard Wood. Professional military education includes the United States Army War College and noncommissioned officer development at the Non-Commissioned Officer Education System. Personnel policies intersect with laws like the Uniform Code of Military Justice and benefit systems administered by the Department of Veterans Affairs for veterans and dependents.
Equipment and Modernization
Equipment spans small arms like the M16 rifle and M4 carbine to armored platforms such as the M1 Abrams main battle tank and Bradley Fighting Vehicle. Aviation assets include the AH-64 Apache, the UH-60 Black Hawk, and cargo types such as the CH-47 Chinook. Artillery and missile systems include the M777 howitzer and the Patriot (missile). Modernization priorities articulated by Army Futures Command address Long Range Precision Fires, next-generation combat vehicles, networked systems under the Integrated Tactical Network, and lethal autonomous systems in coordination with the Defense Advanced Research Projects Agency and defense contractors.
Operations and Deployments
The Army conducts overseas basing in locations such as South Korea, Germany, and rotational deployments to Poland and the Baltic states as part of deterrence initiatives. Expeditionary operations have included major mobilizations during the Operation Desert Storm campaign and prolonged stability operations during the Iraq War and Operation Enduring Freedom. Humanitarian and disaster relief missions have supported responses to earthquakes, floods, and pandemics alongside agencies like United States Agency for International Development and Federal Emergency Management Agency.
Doctrine and Strategy
Army doctrine is codified in field manuals and doctrine publications produced by United States Army Training and Doctrine Command, incorporating concepts like combined arms, maneuver warfare influenced by theorists such as Heinz Guderian and practitioners like Erwin Rommel, and counterinsurgency doctrine revisited after Iraq War and War in Afghanistan (2001–2021). Strategic guidance aligns with national strategies such as the National Defense Strategy and interoperability frameworks under NATO Standardization Office. The Army continues to refine doctrines for multi-domain operations to integrate land, air, sea, cyber, and space effects with partners like United States Space Force and United States Cyber Command.