I guess you didnt know that Australia was on the seats of its pants by being invaded by the Japanese Military, having massive defeats across major cities. BTW, Australia was a BRITISH colony, so it was the BRITISH :P USA stepped in and started to island hop there way to victory.

Canada was mushed into USA lines lead by AMERICAN/BRITISH generals. UK was on the seats of its pants after France fell. Only thing it had left was its airforce. and FA by USA via tanks, ammo, etc.

Yes other soldiers faught, and every bit helped. Its like SOL/Ely vs LaF. Ely is not a major force, but they help, yet they get lost that they are involved in the war :P