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the annexation of Austria into Nazi Germany
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The invasion of Poland marked the beginning of World War II.
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Australia entered World War II
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The Empire of Japan entered World War II.
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approximately 240 Japanese aircraft attacked Darwin in two separate raids, representing the first-ever enemy attack on Australian soil.
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In late May and early June 1942, during World War II, submarines belonging to the Imperial Japanese Navy made a series of attacks on the cities of Sydney and Newcastle in New South Wales, Australia.
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The United States entered the war in the west with Operation Torch.