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The unofficial Christmas truce is declared.
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Tsar Nicholas II takes personal control over Russia's armies.
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The Battle of Verdun begins. The Battle of Verdun was the longest battle of World War 1 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 sends the secret Zimmerman Telegram to Mexico in an effort to entice Mexico to join the war. The British intercept and decipher the coded message.
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U.S. President Woodrow Wilson issues his Fourteen Points to peace.
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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.
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The Treaty of Versailles officially ends World War 1.
