Practice Quiz

CLEP US History II

Category - WWI

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American entry to World War I was assured in March 1917 after the Germans used what kind of vessel to sink five U.S. merchant ships?
  1. U-boat
  2. Zeppelin
  3. Schooner
  4. Nautilus
  5. S-boat
Explanation
Answer: A - German U-boats torpedoed five American merchant ships in March 1917, making U.S. involvement in World War I inevitable. U-boats were submarines that were adept at forming blockades, keeping merchant ships from delivering supplies. The term U-boat specifically describes the German submarines used in World War I and World War II.
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