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Hitler crossed the border in Austria.
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Germany invaded Poland to regain territory they had lost and rule their east neighbouring country.
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Australia entered the war. 11 days later, the Prime Minister (Robert Menzies) announced that 40,000 members of the Militia would be called up for training and 20,000 strong expeditionary force would be formed for overseas service.
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Japan signed Tripartite Pact with Nazi Germany and Fascist Italy, agreeing to assist one another if the other is attacked by a country not involved in the war.
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The United States officially committed to a declaration of War against Germany after the Japanese attacked Pearl Harbour.
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242 Japanese aircrafts attacked towns, ships and the two airfields to try to prevent the Allies from using them as bases to compete for the invasion of Timor and Java.
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The Japanese spotted an American heavy cruiser (The USS Chicago) the night before, using a small float plane that flew over the harbour. They Japanese then bombed the Harbour the next day to attempt to sink the warship and others anchored in the harbour.
