Which policy allowed enemy submarines to sink ships on sight, helping bring the United States into World War I?

Which policy allowed enemy submarines to sink ships on sight, helping bring the United States into World War I?

• A. Zimmerman Telegram
• B. The sinking of Lusitania
• C. Unrestricted submarine warfare
• D. Economic embargo

Answer: (C)

Unrestricted submarine warfare is the policy that allowed enemy submarines to sink ships on sight, including civilian and neutral vessels, in war zones. This approach aimed to cut off supplies to adversaries by threatening all ships in designated waters, not just military targets. It intensified tensions with the United States because American ships and lives were at risk, and it violated neutral rights, pushing the U.S. toward involvement in the war even while it tried to stay out of it. The sinking of Lusitania is often remembered as a turning point, but it was a consequence of this policy, not the policy itself. The Zimmerman Telegram was a separate diplomatic pressure tactic that helped sway opinion toward war but did not involve naval warfare rules. An economic embargo, meanwhile, involves restricting trade rather than engaging submarines at sea.

Unrestricted submarine warfare is the policy that allowed enemy submarines to sink ships on sight, including civilian and neutral vessels, in war zones. This approach aimed to cut off supplies to adversaries by threatening all ships in designated waters, not just military targets. It intensified tensions with the United States because American ships and lives were at risk, and it violated neutral rights, pushing the U.S. toward involvement in the war even while it tried to stay out of it. The sinking of Lusitania is often remembered as a turning point, but it was a consequence of this policy, not the policy itself. The Zimmerman Telegram was a separate diplomatic pressure tactic that helped sway opinion toward war but did not involve naval warfare rules. An economic embargo, meanwhile, involves restricting trade rather than engaging submarines at sea.