Army National Guard of the United States

Army National Guard of the United States
Unit name	Army National Guard of the United States
Dates	1636–present
Country	United States
Branch	United States Army
Role	Reserve Component
Size	~350,000 (authorized)
Garrison	The Pentagon
Commander1	President of the United States
Commander1 label	Commander-in-Chief
Commander2	Secretary of the Army
Commander2 label	Secretary of the Army
Commander3	Chief of the National Guard Bureau
Commander3 label	Chief, National Guard Bureau

Contents

Army National Guard of the United States is the reserve component of the United States Army composed of units from the fifty United States, the District of Columbia, the Commonwealth of Puerto Rico, the United States Virgin Islands, and the Common Northern Mariana Islands. Tracing lineage to militia units established in the 17th century, it serves both state and federal missions under the dual authority of state governors and the President of the United States. The force contributes to national defense, domestic response, and overseas operations alongside the United States Army Reserve and active-duty formations such as I Corps, XVIII Airborne Corps, and Eighth United States Army.

History

The Army National Guard originates from colonial militias like the Massachusetts Bay Colony militia and the Connecticut Militia established in 1636, which later engaged in the King Philip's War, the French and Indian War, and the American Revolutionary War at battles such as Lexington and Concord and the Siege of Boston. Post-independence, state militias participated in the War of 1812, the Mexican–American War, and the American Civil War, including actions at Gettysburg and Antietam. The Militia Act of 1903 (Dick Act) and the National Defense Act of 1916 restructured militia forces into the National Guard system, shaping mobilizations for World War I and World War II alongside the American Expeditionary Forces and Eighth Air Force. Cold War-era reorganizations responded to crises like the Berlin Blockade and the Korean War, while later operations included deployments to Vietnam War, Operation Desert Storm, Operation Iraqi Freedom, and Operation Enduring Freedom with notable engagements in Fallujah, Mosul, and Kandahar. The Guard also supported domestic incidents such as the Great Mississippi Flood of 1927, Hurricane Katrina, the September 11 attacks, and pandemic responses during the COVID-19 pandemic.

Units are organized under state and territory adjutants general and integrated into the federal force via the National Guard Bureau and the United States Army Forces Command. Primary formations include combat brigades like Infantry Brigade Combat Teams and Stryker Brigade Combat Teams, aviation units within Aviation Regiment structures, sustainment commands, and engineer brigades. Higher headquarters may align under numbered corps such as I Corps or joint commands like United States Northern Command. The Chief of the National Guard Bureau serves on the Joint Chiefs of Staff advisory processes and coordinates with the Secretary of Defense and the Secretary of the Army for force management, readiness, and mobilization, using systems like the Total Force Policy and the Defense Support of Civil Authorities framework.

The Guard fulfills federal missions under Title 10 activation for war and contingency operations supporting entities such as United States Central Command, United States European Command, and United States Indo-Pacific Command, providing capabilities in infantry, armor, aviation, intelligence, cyber, and logistics. Under Title 32 or state active duty, governors employ units for disaster relief during events like Hurricane Harvey, Hurricane Maria, and the Northridge earthquake, and for civil support during domestic disturbances and Presidential inaugurations. The Guard also partners with the Federal Emergency Management Agency, Department of Homeland Security, and state emergency management agencies for homeland defense, critical infrastructure protection, and counterdrug operations coordinated with the Drug Enforcement Administration.

Guard members are citizen-soldiers drawn from communities across states and territories, organized into officer commissioning sources including Reserve Officers' Training Corps, United States Military Academy, and state officer candidate schools, with enlisted accessions through Basic Combat Training and specialty courses at Fort Benning, Fort Sill, Fort Leonard Wood, and Fort Rucker. Professional development follows Army career progression with attendance at schools such as the Command and General Staff College, School of Advanced Military Studies, and the NATIONAL DEFENSE University counterparts, and integrates civilian qualifications like the Emergency Management Institute certifications. The Guard maintains medical readiness via programs linked to Military Health System facilities and conducts joint exercises with allies such as NATO, United Kingdom Armed Forces, Canadian Armed Forces, and partner nations through initiatives like the State Partnership Program.

Equipment mirrors active Army inventories including M1 Abrams, M2 Bradley, Stryker, M109 Paladin, UH-60 Black Hawk, CH-47 Chinook, AH-64 Apache, and unmanned systems used by Intelligence and Security Command elements. Sustainment relies on logistics platforms like the HMMWV, LMTV, and theater sustainment brigades coordinating with Defense Logistics Agency. Communications and cyber capabilities integrate systems from Army Network Enterprise Technology Command and United States Cyber Command collaboration. National Guard units have interoperable materiel with joint forces and receive modernization through programs like Army Future Command initiatives and acquisitions overseen by the Assistant Secretary of the Army (Acquisition, Logistics and Technology).

The Guard operates under the dual framework of state authority vested in governors and federal authority under the President of the United States through statutes including Title 10 of the United States Code and Title 32 of the United States Code, and historical precedents such as the Militia Act of 1792 and the Posse Comitatus Act constraints. Mobilization authorities include presidential federalizations, insurrection call-ups, and voluntary state-federal agreements; coordination occurs with the National Guard Bureau and the Office of the Secretary of Defense. Legal adjudication of service matters involves Uniform Code of Military Justice jurisdiction when federally activated and state military codes under state activation, with judicial review through courts such as the United States District Court and appeals to the United States Supreme Court in constitutional matters.

Notable federal deployments include World War I service in the Meuse-Argonne Offensive, World War II campaigns in Normandy and Iwo Jima, Korean War actions on the Pusan Perimeter, Vietnam-era contributions to units such as the 101st Airborne Division, Gulf War operations during Operation Desert Shield/Operation Desert Storm, and significant roles in Operation Iraqi Freedom and Operation Enduring Freedom. Domestic notable responses include flood relief in the Missouri River Floods, wildfire containment in California, hurricane relief for Puerto Rico after Hurricane Maria, and assistance during the COVID-19 pandemic vaccination and logistics efforts. International partnerships and peacekeeping have included missions with United Nations mandates and NATO contingency deployments in places like Kosovo and the Baltic states.