unforgotten history of hiroshima and nagasaki

This is an history my dad told me once when i was little ##hiroshima and ##nagasaki, though it made no sense to me because i was too small to understand and besides i thought it was a bedtime story. *now where is hiroshima located?
[the capital of Hiroshima Prefecture and the largest city in the Chūgoku region of western Honshu - the largest island of Japan].
##why the bombing?##
Many reasons were given as to why US administration decided to drop the bomb on hiroshima and nagasaki, reasons like ;
The United States wanted to force Japan's surrender as quickly as possible to minimize American casualties.
The United States needed to use the atomic bomb before the Soviet Union entered the war against Japan to establish US dominance afterwards
The United States wanted to use the world's first atomic bomb for an actual attack and observe its effect.
outlining these reasons the US was quite in a hurry to drop the bomb.shortly after a successful test of the first atomic bomb at Trinity,New Mexico on july 16 , 1945, the order to drop the atomic bomb on Japan was issued on July 25.
##Impact on hiroshima;##

Hiroshima stands on a flat river delta, with few hills to protect sections of the city. The bomb was dropped on the city centre, an area crowded with wooden residential structures and places of business. These factors meant that the death toll and destruction in Hiroshima was particularly high.
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