Department of the Army

Department of the Army
Agency name	Department of the Army
Logo width	200
Formed	18 September 1947
Preceding1	United States Department of War
Jurisdiction	United States federal government
Headquarters	The Pentagon, Arlington County, Virginia
Chief1 name	Christine Wormuth
Chief1 position	Secretary of the Army
Chief2 name	Randy A. George
Chief2 position	Chief of Staff of the United States Army
Parent department	United States Department of Defense
Child1 agency	United States Army
Website	army.mil

Department of the Army. It is one of the three military departments within the United States Department of Defense and is responsible for administering and equipping the United States Army. Established by the National Security Act of 1947, it succeeded the historic United States Department of War. The department is headquartered at The Pentagon in Arlington County, Virginia, and is led by a civilian Secretary of the Army and the senior military officer, the Chief of Staff of the United States Army.

History

The department's origins trace to the American Revolutionary War and the establishment of the Continental Army in 1775. For over 160 years, the United States Department of War, created in 1789, served as the cabinet-level agency overseeing land forces. Following World War II, the landmark National Security Act of 1947 reorganized the entire military establishment, creating the National Military Establishment, later renamed the United States Department of Defense. This act dissolved the United States Department of War and established the Department of the Army as a subordinate entity alongside the newly created United States Department of the Air Force and the existing United States Department of the Navy. Key subsequent legislation, including the Goldwater–Nichols Act of 1986, further refined the department's role within the unified combatant command structure.

Organization

The department is organized into two primary branches: the civilian secretariat and the military Army Staff. The civilian leadership, headed by the Secretary of the Army, includes Under Secretaries and Assistant Secretaries who oversee policy, acquisition, logistics, and financial management. The military staff, led by the Chief of Staff of the United States Army, consists of various deputy chiefs and directors managing personnel, intelligence, operations, and logistics. This structure supports the department's mission to man, train, and equip the active United States Army, the Army National Guard, and the United States Army Reserve.

Leadership

Civilian leadership is vested in the United States Secretary of the Army, a presidential appointee confirmed by the United States Senate who reports to the United States Secretary of Defense and the President of the United States. The senior uniformed leader is the Chief of Staff of the United States Army, a four-star general who serves as a member of the Joint Chiefs of Staff. Other key leaders include the Under Secretary of the Army, the Vice Chief of Staff of the United States Army, and the Sergeant Major of the Army. The department's legal affairs are overseen by the Judge Advocate General's Corps, U.S. Army.

Responsibilities and functions

Its primary mission is to organize, train, and equip forces for prompt and sustained combat on land. This includes developing weapon systems like the M1 Abrams tank and the AH-64 Apache helicopter, conducting foundational training at installations such as Fort Benning and Fort Sill, and managing a global logistics network. The department is responsible for the doctrine and force structure of the Army, prepares budgets for congressional approval, and executes plans for mobilization, including the integration of the Army National Guard under state and federal control. It also oversees major acquisition programs and installations worldwide.

Major commands and units

The department administers several Army Commands (ACOMs), Army Service Component Commands (ASCCs), and Direct Reporting Units (DRUs). Major ACOMs include United States Army Forces Command (FORSCOM) at Fort Liberty, United States Army Training and Doctrine Command (TRADOC) at Fort Eustis, and United States Army Materiel Command (AMC) at Redstone Arsenal. Key ASCCs are United States Army Europe and Africa, United States Army Pacific, and United States Army Central. Specialized units such as the United States Army Special Operations Command (USASOC) and the United States Army Cyber Command also report directly to the department.

Relationship to other military departments

It operates alongside the United States Department of the Navy and the United States Department of the Air Force under the authority and direction of the United States Secretary of Defense. While each department is separately responsible for organizing, training, and equipping its own service, operational forces from all services are assigned to unified combatant commands like United States Central Command or United States Indo-Pacific Command for missions. The department collaborates closely with the United States Marine Corps (under the Department of the Navy) and the United States Space Force (under the Department of the Air Force) on joint doctrine and operations, as directed by the Goldwater–Nichols Act.

Category:United States Department of Defense Category:1947 establishments in the United States Category:Government agencies established in 1947