What was the relationship between Australia and America in World War 2?
Australia and America did not have a big alliance, if no
allience at all before 1941-1942. The way Australia and America got
an alliance was that Australia was feeling threatened by Japan
entering the war [joining with Germany, Italy, and the French]. We
had a fall out with Britain Because Australia wanted to bring the
8th division home but Britain wanted them to go elsewhere(I think
it was Burma.) So we went and turned to America for help. And
America was very willing because they wanted to get back at japan
because of pearl harbor. Australia was very weakened and without
the Americans help Australia would've lost the battle and been
invaded. Pearl harbor was almost beneficial to Australia otherwise
there would have been no help from America. they won the battle
against the Japanese in the coral sea And Australia and America
have been good friends ever since.
While the above answer is mostly correct, Japan actually did not
actually intend to invade Australia as it was beyond their
capabilites and resources.