During the final stages of World War II in 1945, the United States conducted atomic raids on the Japanese cities of Hiroshima and Nagasaki, the first on August 6, 1945, and the second on August 9, 1945. These two events were the only times nuclear weapons have been used in combat but other thank that the The GBU-43/B was another bomb that was droped by the us and is the most simular to the bombing of japan in 1945