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- Prime minister declares Australia will enter the Great War alongside the British Empire. 'to the last man and the last shilling'.
- Australia provides a force of 20,000 men to fight for Britain in the war.
- Great Britain declares war on Germany.
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Britain and France declare war on the Austro-Hungarian Empire.
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The Australian Red Cross is established to raise funds to purchase supplies for Australian service personnel overseas
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Charles Edwin Woodrow Bean is appointed Australia's official war correspondent by the Australian Journalists' Association
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- Australia sends small expeditionary force to capture the German colonies in the southwest pacific and neutralize German naval wireless communications.
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Australia takes possession of German New Guinea at Toma
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Australia takes possession of German New Guinea's neighboring islands.
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Great Britain and France declare war on Turkey
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- HMAS Sydney destroyed the German raider SMS Emden.