sep 18, 1947 - National Security Act of 1947

Description:

The National Security Act was a law enacting major restructuring of the United States government's military and intelligence agencies following World War II.
The Act merged the Department of War (renamed as the Department of the Army) and the Department of the Navy into the National Military Establishment (NME), headed by the Secretary of Defense. It also created the Department of the Air Force and the United States Air Force, which separated the Army Air Forces into its own service. It also protected the Marine Corps as an independent service, under the Department of the Navy.