You will have to be more specific. All of the combatants in World War II bombed many cities.
Darwin
Nearly every UK city was bombed during World War 2 but London and Coventry were probably destroyed the most.
All of Britain's cities were bombed during World War II
I don't know of a British city that WASN'T bombed during World War II.
The first city to be bombed in World War II was Warsaw, Poland, it was bombed from the first day of the war up to the surrender of Poland.
No Australian city was bombed during WW1.
London was the most bombed capital city during WW2 .
Darwin
The Polish city of Warsaw was repeatedly bombed by the German Luftwaffe .
Darwin was the city in Northern Australia, which was bombed by the Japanese during World War 2.
If you mean during World War 2, nearly every UK city was bombed.
London was bombed during World War 2 because the Nazis were attempting to demoralize the city. The country was not attacked because more people lived in the city.
Oxford
the most bombed city in Great Britain was London. bombs fell on London for 59 consecutive nights.
Darwin, February 19th 1942.
Boise City, Oklahoma
Darwin was bombed during WWII (in 1942).