First Nuclear Bombing in History! In 1945, during the final phase of World War II, America made a decision that changed history forever. On August 6, a nuclear bomb named "Little Boy" was dropped on Hiroshima, and just three days later, on August 9, another bomb named "Fat Man" destroyed Nagasaki. This marked the first and only use of nuclear weapons in war. The United States took this step to force Japan’s surrender and end the war quickly, but it came at a devastating human cost — over 200,000