Truman actually gave the command to detonate the first nuclear weapon & he was the US president in office when man left the old world (conventional) and crossed into the atomic age in 1945. When that A-Bomb went off, the cold war began...even though the Soviets didn't get their bomb until 1949 (stolen from the US via spies).
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Harry S. Truman was US president in 1946 when the Cold War is considered to have began.
Napoleon was long dead by the beginning of the cold war.
Cold War officially ended 1989 with Berlin wall falling. I assume you mean the US President - Bush senior
United States president John F. Kennedy described the cold war as "a hard and bitter". He made this statement during his Inaugural address.
Franklin Delano Roosevelt was the president during World War 2 until he died close to the end of the war, and at the beginning of his fourth term. President Harry Truman was the president at the end of World War 2 and during the Korean War.
To protect itself and its NATO allies -apex