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Archduke Franz Ferdinand the heir to the thrown was assassinated. This sparked the start of the war because soon after Austria Hungary declares war on Serbia.
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Austria Hungary declares war on Serbia for killing Archduke Franz Ferdinand.
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Britain declares war on Germany and France declares war on Austria Hungary. The world is in war.
http://www.historylearningsite.co.uk/world-war-one/causes-of-world-war-one/the-british-declaration-of-war/ -
Russians are defeated at the battle of Tannenberg.
http://www.history.com/this-day-in-history/battle-of-tannenberg-begins -
The american boat is torpedoed without warning. 28 Americans die.
http://www.history.com/this-day-in-history/germans-sink-american-merchant-ship -
President Wilson delivers his war speech after the Germans sink the boat.
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After the Germans sink the S.S Aztec President Wilson declares war and sends in troops. https://history.state.gov/milestones/1914-1920/wwi
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Millions of American men register for service.
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The first American troops arrive in France.
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The american draft was chosen by lottery in Washington DC
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The Americans prevail in the battle of Cantigny.
http://www.history.com/this-day-in-history/u-s-troops-score-victory-at-cantigny -
The US War department authorizes chemical warfare.
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Germany signs armistice and agrees to not start military action.
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The final draft of the peace treaty is shown to President Wilson.
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Germany and the allies sign the peace treaty but china refuses to.
