Where did Hiroshima battle take place?

Answer 1

Hiroshima and Nagasaki are the two Japanese cities that the United States dropped atomic bombs on during (and to end) the Second World War.

1. These aren't necessarily "battles".

2. They happened at the cities that are named in your question.

Answer 2

There was not a battle per se, an atomic bomb was dropped over Hiroshima on August 6 1945.

Answer 3

The atomic bombing of Nagasaki took place in the city of Nagasaki.