
The Department of the Army (DA) is one of the three military departments within the Department of Defense of the United States of America. The Department of the Army is the Federal Government agency within which the United States Army is organized, and it is led by the Secretary of the Army who has statutory authority 10 U.S.C. § 3013 to conduct its affairs and to prescribe regulations for its government, subject to the limits of the law, and the directions of the Secretary of Defense and the President. The Secretary of the Army is a civilian official appointed by the President and confirmed by the Senate. The highest-ranking military officer in the department is the Chief of Staff of the Army, who is also a member of the Joint Chiefs of Staff. Other senior officials of the Department are the Under Secretary of the Army (principal deputy to the Secretary) and the Vice Chief of Staff of the Army (principal deputy to the Chief of Staff.) The Department of War was originally formed in 1789 as an Executive Department of the United States, and was renamed by the National Security Act of 1947 to the Department of the Army on September 18, 1947. By amendments to the National Security Act of 1947 in 1949, the Department of the Army was transformed to its present-day status.
2015
2012

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2012

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Updated version
2020

2015

2011

1990

Command and Control of Army Forces
2003

U.S. Intervention in the Dominican Republic, 1965-1966
1988

Military Psychological Operations Manual
2009

Manual of Army Ranger Procedure, Wilderness Operations, Survival, and Training
2021

1980

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2016

2003

2021

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Invasion Insurgency Civil War 2003 – 2006
2019

Official Updated FM 3-25.150 (Not Obsolete FM 21-50) - 260+ Pages -
2019

2026