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President wilson made public that the U.S. was going to remain its neutrality
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The Lusitania is sunk without warning by a German submarine
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Germany agrees to stop sinking non military U.S. ships
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A proposal for Mexico to join an alliance with Germany if the U.S. were to enter the war. Mexico rejected it, knowing it was much weaker than the U.S.
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Sussex pledge is broken when unrestricted warfare is resumed without warning
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American ship was targeted and sank, killing American passengers
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President Wilson declares war on Germany finally.
