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The Assassination of France Ferdinand
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Austria declared war on Serbia
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Germany declares war on Russia
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Britain and allied countries such as Australia declares war on Germany two sides formed the allied powers and the central powers
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Italy changed sides and declared war on Germany and Austria
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the allies started evacuation from Gallipoli
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Conscription introduced in Britain
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British forces surrender to the Turkish forces at Kut in Mesopotamia
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Start of the battle of Somme
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USA declared war on Germany
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The British launched a major unsuccessful assault on the Western Front
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Armistice between Germany and Russia signed
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Germany broke through Somme
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Second battle of Marne started, defeated the German
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Germany signed armistice with allies and ended the war