The main reason for the passage of the National Security Act was to separate the armed forces into different departments. Enable the nation to meet the challenges of the Cold War. Prevent labor unions from striking during times of war. Desegregate each branch of the nation’s armed forces.

The National Security Act of 1947 mandated a major reorganization of the foreign policy and military establishments of the U.S. Government. The act created many of the institutions that Presidents found useful when formulating and implementing foreign policy, including the National Security Council (NSC).

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