Truman was sworn into office on April 12, 1945 as the thirty-third President of the United States of America. He did not win an election, but he was the Vice President under President Franklin Roosevelt who had died so Harry Truman became President. On August 6, 1945 President Truman announced the dropping of the A-bomb known as the Atomic Bomb. Truman, on August 9, 1945, announced he dropped a second atomic bomb on Japan that World War II.
In June 1945, Harry S. Truman witnessed the signing of the formation of the United Nations, to hopefully preserve peace.
President Truman presented to Congress a 21-point program, proposing the expansion of social security, a full employment program, and other things. The program became know as the Four Deal. .
In 1947, the Soviet Union tried to takeover Turkey and Greece. Truman asked Congress to aid those countries. This aid is known as the Truman Doctrine.
In 1950, when the Communist government of North Korea invaded South Korea, Truman conferred promptly with his military advisers. A long, discouraging struggle happened as U.N. forces held a line above the old boundary of South Korea. Truman kept the war a limited one, rather than risk a major conflict with China and Russia.
His term as President ended in 1953 when he decided not to run for another term.