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First atomic bomb used in battle

First atomic bomb used in battle
Who
Hiroshima
What
First
Where
Japan (Hiroshima)
When
06 August 1945
The first atom bomb to be used aggressively in battle, was dropped on Hiroshima, Japan by the United States at 8:16 a.m. on 6 August 1945.  It had an explosive power equivalent to that of around 15 kilotons of trinitrotoluene (C7H5O6N3), called TNT. Code-named Little Boy, it was 3.04 m (10 ft) long and weighed 4,082 kg (9,000 lb). It burst 565 m (1,850 ft) above the city centre.