Updated: 10/23/2020

Storyboard Text

  • Reasons for U.S Entry into WWI
  • The Sussex Pledge was a promise made by Germany to the United States in 1916. It was broken on March 24 1916, when a German submarine torpedoed the ferry S.S. Sussex which killed fifty and injuring hundreds, including three Americans.
  • On May 7, 1915, the British ocean liner RMS Lusitania, which primarily ferried people and goods across the Atlantic Ocean between the United States and Great Britain, was torpedoed by a German U-boat and sunk.
  • The sinking of the Lusitania enraged Americans and hastened the United States' entrance into World War I.
  • Unrestricted submarine warfare is a type of naval warfare in which submarines sink vessels such as freighters and tankers without warning, as opposed to attacks per prize rules
  • Germany broke its promise to the U.S. to stop attacking passenger ships, angering the U.S.
  • Great Britain was a leading Allied Power during the First World War of 1914–1918, fighting against the Central Powers, especially Germany.
  • Britain, however, was one of America’s closest trading partners, and tension soon arose between the United States and Germany over the latter’s attempted quarantine of the British Isles
  • The Zimmerman Telegram was a secret diplomatic communication issued from the German Foreign Office in January 1917 that proposed a military alliance between Germany and Mexico.The Zimmerman Telegram helped turn the U.S. public, firmly against Germany. On April 2, President Wilson, who had initially sought a peaceful resolution to World War I, urged immediate U.S. entrance into the war.
  • From Germany to Mexico
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