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Austria's Archduke Franz Ferdinand was assasinated
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Austria-Hungary declared war on Serbia
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Germany declared war on Russia
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Germany declares war on France
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Japan joins the Allies to take on Germany
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The British and French met the Germans at the Marne river and beat them
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This is the day that the Germans first use poison gas to kill allied troops
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Italy refused to honor its alliance with Germany and joined the Allies
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To get an advantage on the battlefield, the Allies started using armored tanks sometime in January
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During the battle of Verdun, the Allies launched the battle of Somme, which let them gain 7 miles with high casualties
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The Alliance won the battle of verdun with more than 750,000 casualties
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President wilson asks congress to declare war against germany