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Archduke Franz Ferdinand was assassinated by Gavrilo Princip.
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During this timespan, the First Battle of the Marne was fought, and the Allies pushed the German lines back approximately 40 miles.
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The Sussex pledge was a German renewal of a previous promise to not sink liners without warning or without ensuring thee passengers' safety.
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This act increased the number of soldiers in the regular army to ensure military preparedness.
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The Battle of the Somme occurred during this time period and it was the longest battle of the war. Over 1 million people were killed.
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The Zimmerman Note, which proposed a Mexian alliance with Germany, and offered German support to help Mexico reconquer the territory it lost in America, was intercepted.
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The Senate declared war on April 4, 1917.
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The Committee on Public Information led a propaganda campaign to encourage the American people to support the war.
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The Espionage Act outlawed acts of treason and made it a crime to criticize opponents of the war and silence opponents.
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On this date, the National War Labor Board was established to ensure that the voice of labor was heard.
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This Act required men between the ages of 21 and 30 to register with local draft boards.
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This was the final war, and ended with the signing of an armistice.
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The Treaty of Versailles was signed on this date, which offically ended the war.
