USJFCOM was formed in 1999 when the old United States Atlantic Command was renamed and given a new mission: leading the transformation of the Department of Defense through experimentation and education. USLANTCOM had been active from 1947 to 1993 as a primarily U.S. Navy command, focused upon the wartime defence of the Atlantic sea lanes against Soviet Union attack. After the end of the Cold War, a 1993 reorganization gave the Command a new acronym, USACOM, and brought United States Army Forces Command and Air Combat Command under its authority.