<P> The National Security Act of 1947 was a major restructuring of the United States government 's military and intelligence agencies following World War II . The majority of the provisions of the Act took effect on September 18 , 1947 , the day after the Senate confirmed James Forrestal as the first Secretary of Defense . </P>
what was the purpose of the national security act of 1947 apex
restructuring of the United States government 's military and intelligence agencies following World War II