During World War I, he served in France as a captain with the 129th Field Artillery. He married Bess Wallace in 1919. After engaging briefly and unsuccessfully in the haberdashery business in Kansas City, Mo., Truman entered local politics. Under the sponsorship of Thomas Pendergast, Democratic boss of Missouri, he held a number of local offices, preserving his personal honesty in the midst of a notoriously corrupt political machine. In 1934, he was elected to the Senate and was re-elected in 1940. During his first term he was a loyal but quiet supporter of the New Deal, but in his second term, an appointment as head of a Senate committee to investigate war production brought out his special qualities of honesty, common sense, and hard work, and he won widespread respect.
Elected vice president in 1944, Truman became president upon Roosevelt's sudden death in April 1945 and was immediately faced with the problems of winding down the war against the Axis and preparing the nation for postwar adjustment.
The years 1947–48 were distinguished by civil-rights proposals, the Truman Doctrine to contain the spread of Communism, and the Marshall Plan to aid in the economic reconstruction of war-ravaged nations. Truman's general record, highlighted by a vigorous Fair Deal campaign, brought about his unexpected election in 1948 over the heavily favored Thomas E. Dewey.
Truman's second term was primarily concerned with the Cold War with the Soviet Union, the implementing of the North Atlantic Pact, the United Nations police action in Korea, and the vast rearmament program with its accompanying problems of economic stabilization.
On March 29, 1952, Truman announced that he would not run again for the presidency. After leaving the White House, he returned to his home in Independence, Mo., to write his memoirs. He further busied himself with the Harry S. Truman Library there. He died in Kansas City, Mo., on Dec. 26, 1972.
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