However, Australia was heavily involved in the war effort, with over a million Australians serving in the armed forces. Australian forces fought in a number of campaigns, including the Battle of the Coral Sea, the Battle of Buna-Gona, the Battle of Milne Bay, and the Kokoda Track campaign. Australian troops also served in the Middle East, North Africa, and Europe.
Despite the threat of invasion, Australia was never successfully invaded by Japan. This was due to a number of factors, including the strength of the Australian military, the support of the United States, and the fact that Japan was unable to spare the resources necessary for a full-scale invasion.