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Archduke Ferdinand and his wife are assassinated.
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Russia, France, and Britan go to war against Germany and Austria-Hungry
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Austria-Hungary declares war on Serbia
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The soilders on the western front start digging trenches to make fighting easier.
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The First Battle of the Marne begins. Trench warfare begins as soldiers on both sides dig in.
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Trench warfare begins.
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The Battle of Verdun begins. The Battle of Verdun was the longest battle of World War I and was one of the bloodiest.
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The Battle of the Somme begins. During the Battle of the Somme, tanks are first introduced into battle.
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Germany send the secret Zimmerman Telegran Mexico in an effort to entice MExico to join the war,
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'Murica enters the war.
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The Bolsheviks successfully overthrow the Russian government.
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Russia signs the Treaty of Brest Litovsk, which is a peace treaty between Russia and the Central Powers.
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The Second Battle of the Marne begins.
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Germany signs the armistice at Compiegne, France. Fighting ends on the 11th hour of the 11th day of the 11th month (i.e. 11 a.m. on November 11).
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The Treaty of Versailles officially ends WWI