Sworn in as the 33rd president after Franklin Delano Roosevelt's sudden death, Harry S. Truman presided over the end of WWII and dropped the atomic bomb on Japan.

Who Was Harry S. Truman? Harry S. Truman was Franklin Delano Roosevelt’s vice president for just 82 days before Roosevelt died and Truman became the 33rd president. In his first months in office, he dropped the atomic bomb on Japan, ending World War II. His policy of communist containment started the Cold War, and he initiated U.S. involvement in the Korean War. Truman left office in 1953 and died in 1972.

Early Life Harry S. Truman was the first of three children born to John Anderson Truman, a farmer and mule trader, and his wife, Martha Ellen Truman. Truman was named in honor of his maternal uncle, Harrison Young, but his parents couldn’t decide on a middle name. After more than a month, they settled on simply using the letter “S” as a tribute to both his maternal grandfather, Solomon Young, and his paternal grandfather, Anderson Shipp Truman. Truman grew up on the family farm in Independence, Missouri, and did not attend college. He worked a variety of jobs after high school, first as a timekeeper for a railroad construction company, and then as a clerk and a bookkeeper at two separate banks in Kansas City. After five years, he returned to farming and joined the National Guard.

Military Career When World War I erupted, Truman volunteered for duty. Though he was 33 years-old—two years older than the age limit for the draft—and eligible for exemption as a farmer, he helped organize his National Guard regiment, which was ultimately called into service in the 129th Field Artillery. Truman was promoted to captain in France and assigned Battery D, which was known for being the most unruly battery in the regiment. In spite of a generally shy and modest temperament, Truman captured the respect and admiration of his men and led them successfully through heavy fighting during the Meuse-Argonne campaign.

Early Involvement in Politics After the war, Truman returned home and married his childhood sweetheart, Elizabeth “Bess” Wallace in 1919, with whom he had one daughter, Mary Margaret. That same year, he made a foray into business when he and an associate, Eddie Jacobson, set up a hat shop in Kansas City. But with America experiencing an economic decline in the early 1920s, the business failed in 1922. With the closing of the business, Truman owed $20,000 to creditors. He refused to accept bankruptcy and insisted on paying back all the money he borrowed, which took more than 15 years. About this time, he was approached by Democratic boss Thomas Pendergast, whose nephew James served with Truman during the war. Pendergast appointed Truman to a position as an overseer of highways, and after a year, chose him to run for one of three county-judge positions in Jackson County. He was elected judge, which was an administrative rather than a judicial position, but he was defeated when he ran for a second term. Truman ran again in 1926 and was elected as a presiding judge, a position he held until he ran for senator.

Senator Truman was elected to the United States Senate in 1934. In his first term, he served on the Senate Appropriations Committee, which was responsible for allocating tax money for Franklin Delano Roosevelt’s New Deal projects, and the Interstate Commerce Committee, which oversaw railroads, shipping, and interstate transport. Along with Senator Burton Wheeler, Truman began investigating railroads, and in 1940, he initiated legislation that imposed tighter federal regulation on the railroads, which helped him establish his reputation as a man of integrity. By the time Truman was up for reelection in 1940, Thomas Pendergast had been convicted of tax evasion and associated with voter fraud, and many predicted Truman’s connection to Pendergast would result in a defeat. Truman didn’t try to hide or distort his relationship with Pendergast, however, and his reputation as a frank and ethical man helped him win re-election, albeit narrowly. In his second term, Truman chaired a special committee to investigate the National Defense Program to prevent war profiteering and wasteful spending in defense industries. He gained public support and recognition for his straightforward reports and practical recommendations, and he won the respect of his colleagues and the populace alike.

Vice Presidency When Roosevelt had to choose a running mate for the 1944 presidential election, he deemed his acting vice president, Henry Wallace, unacceptable. Wallace was disliked by many of the senior Democrats in Washington, and since it was apparent that Roosevelt might not survive his fourth term, the vice presidential pick was especially important. Truman’s popularity, as well as his reputation as a fiscally responsible man and a defender of citizens’ rights, made him an attractive option. Truman was initially reluctant to accept, but once he received the nomination, he campaigned vigorously. Roosevelt and Truman were elected in November 1944, and Truman took the oath of office on January 20, 1945. He served as vice president just 82 days before Roosevelt died of a massive stroke, and he was sworn in as president on April 12, 1945. With no prior experience in foreign policy, Truman was thrust into the role of commander in chief and charged with ending a world war. In the first six months of his term, he announced the Germans’ surrender, dropped atomic bombs on Hiroshima and Nagasaki—ending World War II—and signed the charter ratifying the United Nations.

After the War In spite of these early successes, Truman’s diplomatic situation was beset with challenges. Although the Soviet Union had been a powerful ally to the United States during the war, international relations deteriorated quickly when it became apparent that the Soviets intended to remain in control of Eastern European nations that were expected to be reestablished according to their pre-Hitler governments. This, along with the exclusion of the Soviets from the reconstruction of Asia, began the Cold War.

Re-Election Republicans won both houses of Congress in 1946, which was seen as a judgment of Truman’s policies, and polls indicated that re-election was all but impossible. So certain seemed the victory of New York Governor Thomas Dewey that the “Chicago Tribune” famously went to press with the headline “Dewey Defeats Truman” before many polling locations had released results. The final outcome was a win for Truman with 49.5 percent of the vote, compared with Dewey’s 45.1 percent, and was one of the greatest upsets in the history of American elections. Harry Truman holds up the newspaper cover that falsely predicted his defeat. Photo: Getty Images

The Korean War Truman announced his domestic policy initiative, the “Fair Deal” program, in his 1949 State of the Union address. Building on Roosevelt’s “New Deal,” it included universal health care, an increase in the minimum wage, more funding for education and a guarantee of equal rights under the law for all citizens. The program was a mixed success. In 1948, racial discrimination was banned in federal government hiring practices, the military was desegregated and the minimum wage had gone up. National health insurance was rejected, as was more money for education. The Korean War broke out in June 1950, and Truman swiftly committed U.S. troops to the conflict. He believed that North Korea’s invasion of South Korea was a challenge from the Soviets, and that, if left unchecked, it could escalate to another world war and to further communist aggression. After a brief wave of public support for his decision, criticism mounted. Truman initially endorsed a rollback strategy and encouraged General Douglas MacArthur to breach the 38th parallel, bringing forces into North Korea to take over the government. But when China sent 300,000 troops to the aid of North Korea, Truman changed tactics. He reverted to the containment strategy, focusing on preserving the independence of South Korea rather than eliminating communism in the north. MacArthur publicly disagreed. To Truman, this was insubordination and a challenge to his authority, and he dismissed MacArthur in April 1951. MacArthur was a popular general, and Truman’s already-weak approval rating declined further.

Steel Strike Truman’s challenges were not limited to international affairs. On the home front, he was struggling to manage a labor dispute between the United Steel Workers of America and the major steel mills. The union demanded a wage increase, but the mill owners refused to grant it unless the government allowed them to increase the prices of their consumer goods, which had been capped by the Wage Stabilization Board. Unable to broker an agreement and unwilling to invoke the Taft-Hartley Act, which was passed in spite of his veto in 1947 and would have allowed him to seek an injunction that prevented the union from striking, Truman seized the steel mills in the name of the government. The steel companies responded by filing a suit against the government, and the case, Youngstown Sheet & Tube Company v. Sawyer (sometimes referred to as "The Steel Seizure Case") went before the Supreme Court. The Court found in favor of the steel mills and forced Secretary of Commerce Charles Sawyer to give the mills back to the owners. Truman's handling of this dispute further tarnished his reputation with the American people.

Post-Presidency In March 1952, Truman announced that he would not run for re-election. He gave his support to Governor Adlai Stevenson, the Democratic nominee, though Stevenson was distancing himself from the president because of his poor approval rating. After retiring from the presidency, Truman returned to Independence, Missouri, where he wrote his memoirs, oversaw the construction of his presidential library and took long walks. He died on December 26, 1972, and is buried next to Bess in the courtyard of the Truman Library.