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Harry S. Truman

Historical Figure

Harry S. Truman

1884–1972

President of the United States from 1945 to 1953

Victorian Era

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Key Dates

Biography

Harry S. Truman was the 33rd president of the United States, serving from 1945 to 1953. As the 34th vice president in 1945, he assumed the presidency upon the death of Franklin D. Roosevelt that year. Subsequently, Truman implemented the Marshall Plan in the aftermath of World War II to rebuild the economy of Western Europe, and established both the Truman Doctrine and NATO to contain the expansion of Soviet communism. A member of the Democratic Party, he proposed numerous New Deal coalition liberal domestic reforms, but few were enacted by the conservative coalition that dominated the United States Congress.

Source: Wikipedia · Compiled March 2026 · AI-summarized

Timeline

1884
Birth

American colonel and politician, 33rd President of the United States (d. 1972)

May 8 →
1945
Event

U.S. President Harry S. Truman announces the bombing of Hiroshima with an atomic bomb while returning from the Potsdam Conference aboard the heavy cruiser USS Augusta (CA-31) in the middle of the Atlantic Ocean.

August 7 →
1947
Event

On 26 July 1945, Allied leaders Winston Churchill, Harry S. Truman, and Chiang Kai-shek issued the Potsdam Declaration, which demanded Japan's unconditional surrender. This declaration also defined the major goals of the post surrender Allied occupation: "The Japanese government shall remove all obstacles to the revival and strengthening of democratic tendencies among the Japanese people. Freedom of speech, of religion, and of thought, as well as respect for the fundamental human rights shall be established" (Section 10). In addition, the document stated: "The occupying forces of the Allies shall be withdrawn from Japan as soon as these objectives have been accomplished and there has been established in accordance with the freely expressed will of the Japanese people a peacefully inclined and responsible government" (Section 12). The Allies sought not merely punishment or reparations from a militaristic foe, but fundamental changes in the nature of its political system. In the words of political scientist Robert E. Ward: "The occupation was perhaps the single most exhaustively planned operation of massive and externally directed political change in world history." The constitution provides for a parliamentary system of government and guarantees certain fundamental rights. Under its terms the Emperor of Japan is "the symbol of the State and of the unity of the people" and exercises a purely ceremonial role without the possession of sovereignty. The constitution, also known as the "Postwar Constitution" ( 戦後憲法 Sengo-Kenpō?) or the "Peace Constitution" ( 平和憲法 Heiwa-Kenpō?), is most characteristic and famous for the renunciation of the right to wage war contained in Article 9 and to a lesser extent, the provision for de jure popular sovereignty in conjunction with the monarchy.

May 3 →
1947
Event

Cold War: in an effort to fight the spread of Communism, the U.S. President Harry S. Truman signs an act into law that will later be called the Truman Doctrine. The act grants $400 million in military and economic aid to Turkey and Greece, each battling an internal Communist movement.

May 22 →
1947
Event

Cold War: U.S. President Harry S. Truman signs the National Security Act of 1947 into United States law creating the Central Intelligence Agency, United States Department of Defense, United States Air Force, Joint Chiefs of Staff, and the United States National Security Council.

July 26 →
1947
Event

The first televised White House address is given by U.S. President Harry S. Truman.

October 5 →
1948
Event

President Harry S. Truman signs the Marshall Plan, authorizing $5 billion in aid for 16 countries.

April 3 →
1948
Event

U.S. President Harry S. Truman issues a peacetime military draft in the United States amid increasing tensions with the Soviet Union.

July 20 →
1948
Event

U.S. President Harry S. Truman signs Executive Order 9981 desegregating the military of the United States.

July 26 →
1949
Event

US President Harry S. Truman signs the National Security Act Amendment, streamlining the defense agencies of the United States government, and replacing the National Military Establishment with the United States Department of Defense.

August 10 →
1950
Event

President Harry S. Truman announces a program to develop the hydrogen bomb.

January 31 →
1950
Event

Puerto Rican nationalists Griselio Torresola and Oscar Collazo attempt to assassinate US President Harry S. Truman at Blair House.

November 1 →

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