Reasons why the U.S. entered WW1

Reasons why the U.S. entered WW1

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These are reasons why U.S. entered WW1.

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  • The sinking of the Lusitania- The sinking of the Cunard ocean liner RMS Lusitania occurred on Friday, 7 May 1915 during the First World War. The ship was identified and torpedoed by the German U-boat U-20 and sank in 18 minutes. The vessel went down 11 miles off the Old Head of Kinsale, Ireland, killing 1,198 and leaving 761 survivors.
  • 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. Prize rules call for submarines to surface and search merchantmen and place crews in "a place of safety" before sinking them, unless the ship showed "persistent refusal to stop ... or active resistance to visit or search".
  • The Sussex Pledge promised a change in Germany's naval warfare policy. These were the primary elements of the undertaking 1. Passenger ships would not be targeted; 2. Merchant ships would not be sunk until the presence of weapons had been established, if necessary by a search of the ship; 3. Merchant ships would not be sunk without provision for the safety of passengers and crew.
  • The Zimmerman Note was an internal diplomatic communication issued from the German Foreign Office in January, 1917 that proposed a military alliance between Germany and Mexico in the event of the United States' entering World War I against Germany.
  • The United States in World War I declared war on the German Empire on April 6, 1917. The U.S. was an independent power and did not officially join the Allies. It closely cooperated with them militarily but acted alone in diplomacy. The U.S. made its major contributions in terms of supplies, raw material and money starting in 1917.
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