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Information about National Security Act Of 1947

President Truman signs the National Security Act Amendment of 1949 with guests in the Oval Office.


The National Security Act of 1947, Pub. L. No. 235, 80 Cong., 61 Stat. 496 (July 26, 1947), signed by U.S. President Harry S. Truman realigned and reorganized the United States' armed forces, foreign policy, and Intelligence Community apparatus in the aftermath of World War II. The majority of the provisions of the Act took effect on 18 September 1947, the day after the Senate confirmed James V. Forrestal as the first Secretary of Defense.

The Act merged the Department of War and the Department of the Navy into the National Military Establishment (NME) headed by the Secretary of Defense. It was also responsible for the creation of a separate Department of the Air Force from the existing United States Army Air Forces. Initially, each of the three service secretaries maintained quasi-cabinet status, but the act was amended on 10 August 1949 to assure their subordination to the Secretary of Defense. At the same time, the NME was renamed as the Department of Defense.

Aside from the military reorganization, the act established the National Security Council, a central place of coordination for national security policy in the Executive Branch, and the Central Intelligence Agency, the United States' first peacetime intelligence agency.

The act and its changes, along with the Truman Doctrine and the Marshall Plan, were major components of the Truman administration's Cold War strategy.

The bill signing took place aboard Truman's C-54 presidential aircraft Sacred Cow, the predecessor of Air Force One. [1].

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Harry S. Truman (May 8 1884 – December 26 1972) was the thirty-third President of the United States (1945–1953); as vice president, he succeeded to the office upon the death of Franklin D. Roosevelt. During World War I he served as an artillery officer.
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United States Armed Forces is the military service of the United States and is structured into five branches.
  • U.S. Army
  • U.S. Marine Corps
  • U.S. Navy
  • U.S. Air Force
  • U.S.

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neutrality is disputed.
* Its neutrality or factuality may be compromised by weasel words.

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United States Intelligence Community is a cooperative federation of sixteen separate United States government agencies and organizations that work together to conduct intelligence activities considered necessary for the conduct of foreign relations and the protection of the
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Allied powers:
 Soviet Union
 United States
 United Kingdom
 China
 France
...et al. Axis powers:
 Germany
 Japan
 Italy
...et al.
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  • 96 - Nerva is proclaimed Roman Emperor after Domitian is assassinated.

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United States Senate

Type Upper House

President of the Senate Richard B. Cheney, R
since January 20, 2001
President pro tempore Robert C. Byrd, D
since January 4, 2007

Members 100
Political groups Democratic Party
Republican Party
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James Vincent Forrestal (February 15, 1892 – May 22, 1949) was a Secretary of the Navy and the first United States Secretary of Defense. Forrestal's death resulted from a fall out of a Bethesda Naval Hospital window which has led to speculation and much controversy.
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The United States Secretary of Defense (SECDEF) is the head of the U.S. Department of Defense (DoD), concerned with the armed services and military matters. The role of the Secretary of Defense is to be the principal defense policy advisor to the President and is responsible for
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United States Department of War was the department of the United States government's executive branch responsible for the operation and maintenance of land (and later air) forces from 1789 until September 18, 1947, when it became part of the National Military Establishment
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United States Department of the Navy and Marine Corps was established by an Act of Congress on April 30, 1798, to provide administrative and technical support, and civilian leadership to the United States Navy and the United States Marine Corps (and when directed by the Congress or
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United States Air Force (USAF) is the aerial warfare branch of the United States armed forces and one of the seven uniformed services. Previously part of the United States Army, the USAF was formed as a separate branch of the military on September 18, 1947.
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United States Army Air Forces (USAAF) was the aviation component of the United States Army primarily during World War II. The title of Army Air Forces succeeded the prior name of Army Air Corps in June 1941 during preparation for expected combat in what came to be known as World
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Department of Defense redirects here. For the defense departments in governments of other countries, see defence ministry.

United States
Department of Defense
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The White House National Security Council (NSC) in the United States is the principal forum used by the President for considering national security and foreign policy matters with his senior national security advisors and Cabinet officials and is part of the President's
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Central Intelligence Agency

Seal of the Central Intelligence Agency
Agency overview
Formed 26 July, 1947
Preceding Agency Central Intelligence Group

Headquarters Langley, Virginia, United States

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The Truman Doctrine was a proclamation by U.S. president Harry S. Truman on March 12, 1947. It stated that the U.S. would support Greece and Turkey with economic and military aid to prevent their falling into the Soviet sphere.
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Marshall Plan (from its enactment, officially the European Recovery Program [ERP]) was the primary plan of the United States for rebuilding and creating a stronger foundation for the allied countries of Europe, and repelling communism after World War II.
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The Cold War was the period of conflict, tension and competition between the United States and the Soviet Union and their respective allies from the mid-1940s until the early 1990s.
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Type Military transport aircraft
Manufacturer Douglas Aircraft Company
Introduced 1942
Retired 1975
Primary users United States Army Air Forces
United States Navy
Number built 1,170
Developed from
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Air Force One is the air traffic control call sign of any United States Air Force aircraft carrying the President of the United States.[1] Since 1990, the presidential fleet has consisted of two specifically configured, highly customized Boeing 747-200B series
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