Why was important Harry S. Truman during the war and in US history?

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Thanks a lot.
A yahoo's friend

Harry S. Truman was noted for his straight talk (no political rhetoric) and taking responsibility. His "The Buck Stops Here" slogan became the trademark of those who also accept responsibility. He was a no-nonsense president. The most notable decisions were when he fired Gen. Douglas McArthur and to use the atomic bomb on Japan. Both had a profound effect on US history.

Truman was a populist president and came to have a mandate, of finishing the war and oversee it with morality. He coined the phrase, "The Buck Stops Here", when it came to responsibly! He also checked the power of the military by firing Gen. MacArthur, (during the Koran War)! Not to mention the two bombs he dropped on Japan! He stepped up to the plate in a time of need!

Harry S. Truman (May 8, 1884 – December 26, 1972) was the thirty-third President of the United States (1945–1953). As vice president, he succeeded Franklin D. Roosevelt, who died less than three months after he began his fourth term.

During World War I Truman served as an artillery officer. After the war he became part of the political machine of Tom Pendergast and was elected a county judge in Missouri and eventually a United States Senator. After he gained national prominence as head of the wartime Truman Committee, Truman replaced vice president Henry A. Wallace as Roosevelt's running mate in 1944.

As president, Truman faced challenge after challenge in domestic affairs. The tumultuous reconversion of the economy of the United States was marked by severe shortages, numerous strikes, and the passage of the Taft-Hartley Act over his veto. He confounded all predictions to win re-election in 1948, largely due to his famous Whistle Stop Tour of rural America. After his re-election he was able to pass only one of the proposals in his Fair Deal program. He used executive orders to begin desegregation of the U.S. armed forces and to launch a system of loyalty checks to remove thousands of communist sympathizers from government office, even though he strongly opposed mandatory loyalty oaths for governmental employees, a stance that led to charges that his administration was soft on communism. Truman's presidency was also eventful in foreign affairs, with the end of World War II and his decision to use nuclear weapons against Japan, the founding of the United Nations, the Marshall Plan to rebuild Europe, the Truman Doctrine to contain communism, the beginning of the Cold War, the creation of NATO, and the Korean War. Corruption in Truman's administration reached the cabinet and senior White House staff. Republicans made corruption a central issue in the 1952 campaign.

http://en.wikipedia.org/wiki/Harry_S._Tr...