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W W I started on July 28,1914
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Zimmermann telegram was a secret coded note that was sent from Germany to Mexico.Asking them to help in the war.
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President Wilson declared war on Germany saying '' The world must be safe for democracy'' later voted to declare war on Germany.
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the sinking of Lusitania said to have killed 1,000 people and may of been carrying military equipment.
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President Wilson tried to keep America out of the W W I ,but Germany keep on abusing America's neutral status. America entered W W I in 1917