Due to the aggressive actions of the Germanís when they invaded Poland on September 1, 1939, Australia declared war on Germany on September 3, 1939. Then, after many aggressions by the Japanese, Australia decided to declare war on Japan and ask America for help against the Japanese forces. This was America and Australiaís first relation during World War II.
The World War II experience, similarities in culture and historical background, and shared democratic values have made U.S. relations with Australia exceptionally strong and close. Ties linking the two nations cover the entire spectrum of international relations--from commercial, cultural, and environmental contacts to political and defense cooperation.
World War II required many American soldiers to go to Australia. The many soldiers were said to be happy living there because of the good hospitality of the Australians and fun activities. During the war years of 1941 through 1945, relations between American soldiers and Australians were, on the whole, favorable.