World War I Causes and US Entry · US History

Germany’s decision to resume which policy in January 1917 was the most direct cause of the U.S. declaration of war?

  1. Unrestricted submarine warfare policy
  2. Trench warfare on the Eastern Front
  3. The invasion of neutral Switzerland
  4. The use of chemical weapons in Belgium
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Correct answer: Unrestricted submarine warfare policy

Germany believed they could starve Britain into surrender before the U.S. could mobilize. By sinking all ships in the war zone, including neutral American vessels, they violated the principle of freedom of the seas.

Difficulty: Medium Question 7 of 20

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