Truman signs the National Security Act which set up much of the framework for policy making for the next 40 years of the Cold War.
The Act established a unified Dept of Defense. It established the Nat’l Security Council which would service as a clearinghouse of information that gave brief but detailed reports to the President. It established the CIA, which replaced the CIG, the Central Intelligence Group.
The CIA, however, became much more. It was a separate agency that would not only gather information but carry out covert operations in foreign countries.