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Assassination of archduke Franz Ferdinand
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Austria-Hungary declares war on Serbia, this is the first war of WW1
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The first battle of Ypres is fought
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Gallipoli campaign begins
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Germany sinks the British owned lusitania
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The battle of the somme
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The United States enters the war
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Russia signs the Treaty of Brest-Litovsk with Germany
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US signs the Armistice
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Peace conference begins at paris