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The development of the first atomic bomb is signed into agreement between the Prime minister of Great Britain, Winston Churchill, and FDR in Hyde park, NY.
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The first nuclear chain is produced at the University of Chicago. Creating fission of the Uranium U-235.
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Ralph Buche appointed 1st African American official into the US State Department.
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G.I. Bill of rights is signed into law, providing benefits to veterans.
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FDR sworn in for an unprecedented 4th term as the U.S. President.
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President Franklin D. Roosevelt suddenly dies. Vice President Harry S. Truman assumes the presidency following FDR's death.
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Truman gives the greenlight for the use of the atomic bomb with the bombing of Hiroshima. 3 days later the second bomb is dropped on Nagasaki.
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President Truman establishes the Presidents committee on civil rights to investigate the status of civil rights in the Unites states.
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Truman signs the Marshall plan which authorizes 15 billion in aid for 16 countries.
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The 22nd Amendment to the U.S. limiting presidents to two terms is ratified.
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Marshall plan expires after distributing more than 13.3 billion USD in foreign aid to rebuild Europe.
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President Truman announces the United States has developed a hydrogen bomb.
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Dwight D. Eisenhower is sworn into office as the 34th President of the U.S.