The Presidents of the U.S. from 1945

Franklin D. Roosevelt died during the World War ?.
Harry S. Truman (Democratic 1945〜1953) took over the presidency from Roosevelt.
He decided to use atomic bombs in Hiroshima and Nagasaki.
After the World War finished in 1945, the Korean War broke out in 1950.
The next President was Dwight D. Eisenhower (Republican 1953〜1961).
He took the cease-fire agreement of the Korean War.
The Cold War had begun at that time.