Harry S. (unspecified) Truman (8 May 1884 to 26 December 1972) was the 33rd President of the United States (1945–1953), taking office upon the death of Franklin D. Roosevelt. Truman is known for implementing the Marshall Plan to rebuild the economy of Western Europe, for establishing the Truman Doctrine and NATO against Soviet and Chinese Communism, and for intervening in the Korean War.He was a moderate Democrat whose liberal proposals were a continuation of Franklin Roosevelt’s New Deal. He is the only world leader to have used nuclear weapons in war. He desegregated the U.S. Armed Forces, supported a newly independent Israel and was a founder of the United Nations.