National Security Act of 1947

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The National Security Act of 1947 is a landmark U.S. law that reorganized the nation’s military and intelligence structure, creating institutions such as the Department of Defense, the National Security Council, and the Central Intelligence Agency.


Statements (46)

Predicate Object
instanceOf United States federal statute
amendedBy National Security Act Amendments of 1949
appliesTo executive branch of the United States government
authorized conduct of covert operations by the CIA (as later interpreted and amended)
coordination of intelligence activities
citation 61 Stat. 495
codifiedIn Title 50 of the United States Code
context early Cold War
post–World War II reorganization
country United States of America
surface form: United States
created Central Intelligence Agency
Department of Defense
Joint Chiefs of Staff
National Military Establishment
National Security Council of the United States
surface form: National Security Council

National Security Resources Board
United States Secretary of Defense
surface form: Secretary of Defense

United States Air Force
dateSigned 1947-07-26
defined functions of the Central Intelligence Agency
functions of the National Security Council
effectiveDate 1947-09-18
effectOfAmendments made Secretary of Defense a cabinet-level position with greater authority
renamed National Military Establishment as Department of Defense
enactedBy United States Congress
establishedRoleOf Secretary of Defense as principal defense policy advisor to the President
governs coordination of national security policy
structure of U.S. defense establishment
historicalSignificance cornerstone of the modern U.S. national security state
institutionalized peacetime intelligence apparatus in the United States
legislativeSession 80th United States Congress
merged United States Department of War
surface form: Department of War

Department of the Navy
officeHeldBySigner President of the United States
publicLawNumber Public Law 80-253
purpose to coordinate military, intelligence, and foreign policy
to provide for the national security of the United States
relatedTo Central Intelligence Agency Act of 1949
Goldwater–Nichols Department of Defense Reorganization Act of 1986
reorganized United States Armed Forces
surface form: United States armed forces

United States Intelligence Community
surface form: United States intelligence community
resultedIn independent United States Air Force
Department of Defense
surface form: unified Department of Defense
separatedFrom United States Army Air Forces
shortTitle National Security Act of 1947 self-link
signedBy President Harry S. Truman
surface form: Harry S. Truman

Referenced by (55)

Full triples — surface form annotated when it differs from this entity's canonical label.

Public Law 81-110 relatedTo National Security Act of 1947
Strategic Services Unit relatedTo National Security Act of 1947
Public Law 80-253 shortName National Security Act of 1947
this entity surface form: National Security Act
National Security Act of 1947 shortTitle National Security Act of 1947 self-link
President Harry S. Truman signedInstrument National Security Act of 1947
subject surface form: Harry S. Truman