Any American Should Pass This US History Quiz

What prompted the US to join World War I?

Retry Correct Incorrect America was prompted to join the efforts of World War I after a German submarine sank an unarmed British ocean liner called the Lusitania. It was carrying 128 American passengers, so the US joined forces with the Allies.

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Three Lions/Getty Images

Three Lions/Getty Images

What prompted the US to join World War I?

• The decline in the economy
• They never joined World War I.
• The sinking of a submarine
• The sinking of an ocean liner