Explanation:

On August 6, 1945, during World War II (1939-45), an American B-29 bomber dropped the world's first deployed atomic bomb over the Japanese city of Hiroshima.On this day in 1945, at 8:16 a.m. Japanese time, an American B-29 bomber, the Enola Gay, drops the world's first atom bomb, over the city of Hiroshima. Approximately 80,000 people are killed as a direct result of the blast, and another 35,000 are injured.
On the morning of Aug. 9, the Soviet Union declared war on Japan, and then the United States dropped the bomb on Nagasaki. After the bombing, Japan accepted the Potsdam terms and unconditionally surrendered to the United States on Aug. 14, a day known as Victory in Japan, or V-J, Day. It marked the end of World War II.