1942.
Depends which bombing of Darwin you are referring to since Darwin was bombed 64 times during WW2. However, if you mean the first attack on Darwin then it occurred on the 19th of February 1942.
10 million dollars was spent on defence on Darwin
Dutch, Americans.
the army
Australians were targets.
Yes.
There is no argument - it happened.
Singapore did not play a part in the Bombing of Darwin, which was carried out by Japan against Australia in 1942. Singapore's connection would be that the country fell to Japan just days before the bombing.
Broome was bombed.
3 months
The population was 5,800.
When Darwin was bombed, the Australian Prime Minister was John Joseph Curtin.