On July 25, 1947, the National Security Act of 1947 was passed, establishing a linkage between the military and national security, and setting up the National Security Council (NSC), the CIA, the Department of Defense, and several other new agencies, including the National Military Establishment with three separate departments (the Army, the Navy and the new US Air Force), and the Joint Chiefs of Staff.

Learn more about the National Security Act of 1947.