On the 6th August 1945, the USA dropped an atomic bomb nicknamed “Little Boy” on the Japanese city of Hiroshima from the B-29 aircraft Enola Gay. 70,000 people were killed instantly, of whom 20,000 were military personnel. Approximately another 70,000 died over the following months due to radiation sickness, burns, and other injuries directly related to the explosion.
The Potsdam Declaration issued on the 28th July by the Allies called for the unconditional surrender of Japan. If the government did not surrender they threated “the complete destruction of the Japanese armed forces and…utter devastation of the Japanese homeland”. Having completed the successful Trinity atomic test on the 16th July, the USA felt that the atomic bomb could quickly end the war in the Pacific.
Hiroshima was chosen as a target due to its industrial and military significance since it was the command centre for the defence of southern Japan and contained approximately 40,000 military personnel. The Enola Gay and six accompanying aircraft had a 6-hour flight from the air base at North Field, Tinian before reaching the city where they released the bomb at 8.15am. It exploded 600m above the city as planned, with the equivalent to 16 kilotons of TNT. Virtually all buildings within a mile of the blast were flattened.
Following the bombing, President Truman warned that if Japan did not surrender, “they may expect a rain of ruin from the air, the like of which has never been seen on this earth.” Japan did not surrender. A second bomb was dropped on Nagasaki three days later.