Nuclear Weapons History: A Timeline of Global Change
Nuclear weapons history began in the twentieth century, when advances in physics transformed atomic energy into a weapon of unprecedented destructive power. The Manhattan Project, completed during World War II, marked the beginning of the nuclear age.
The atomic bombings of Hiroshima and Nagasaki demonstrated its devastating military potential, while the Cold War intensified an arms race shaped by deterrence, technological competition, international security, and continuing debates over proliferation and disarmament.
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