Reasons for WWI

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  • Reasons why the U.S. entered WWI
  • The Sinking of the Lusitania
  • The Sussex Pledge
  • By: Brianna Groves Period 5
  • The Zimmerman Note
  • May 7, 1915 128 Americans perished. The unrestricted submarine warfare caused the U.S. to enter World War I against the Germans.
  • Unrestricted Submarine Warfare
  • March 19, 1916 Germany did not want to strengthen the Allies by drawing the United States into the war. Germany promised not to sink anymore merchant ships without warning in order to talk the United States out of war.
  • US Enters WW1
  • January 16, 1917 Germany sent this to Mexico instructing an ambassador to convince Mexico to go to war with the U.S. It was intercepted, causing the U.S. to mobilize against Germany, proving hostility.
  • February 1, 1917 Germany believed that they could starve Britain into submission by sinking all merchant ships in sight, cutting supplies. They thought this would draw the United States into war.
  • Causes for the U.S. entering WWI include the sinking of the Lusitania, unrestricted submarine warfare, The Sussex Pledge, and The Zimmerman Note.
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