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Franz Ferdinand killed by Serbian nationalist.
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The Great War was started due to Ferdinand being killed.
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Kaiser instructed for his people to sink any and all ships they encountered.
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German subs sank a ship named the Lusitania.
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British and French against germans.
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President Woodrow Wilson id re-elected for a second term.
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A letter proposing alliance between Germany and Mexico.
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The U.S officially declares war on Germany.
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This required all men between the ages of 21-30 to register for military service.
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This act made it illegal to speak badly about the U.S government.
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Russia drops out of the Great War mainly due to the bolshevik revolution happening internally in the country.
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Travelling in groups to protect merchant ships from attacking countries.
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Woodrow Wilson made a speech to promote world peace.
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Germany signs armistice to ceasefire ending WW I.
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This put further restrictions on speech and arms in the U.S.
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It killed an estimated 50 million people. It attacked over one-fifth of the world's population.