Harry S. Truman (1884 – 1972) was the 33rd President of the United States from 1945–1953. A WWI veteran, Truman assumed the presidency upon the death of Franklin Roosevelt in April 1945. Some of his accomplishments include implementing the Marshall Plan to rebuild the economy of Western Europe, integrating the armed forces, promoting establishment of the Truman Doctrine and NATO as a bulwark against Soviet and Chinese communist expansion, and intervention in the Korean War.