Political Parties
-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?

Question

Quizplus · Accepted Answer

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.

Political Parties -American Entry to World War I Was Assured in March