United StatesQuestion 101 (2025 list) · Recent American history
Why did the United States enter World War I?
- aBecause Japan attacked Pearl Harbor
- bTo stop the spread of communism
- cBecause Germany attacked U.S. civilian shipsCorrect answer
- dTo force the Iraqi military from Kuwait
Why?
The United States entered World War I in 1917, mainly because German submarines attacked American ships. You could also say to support the Allied Powers or to oppose the Central Powers.
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Source
Questions and answers: U.S. Citizenship and Immigration Services (USCIS), 128 Civics Questions and Answers (2025 version), M-1778, and Civics Questions and Answers (2008 version), rev. 08/21 — public domain. USCIS accepts other answers too; we show one of them. The wrong options and the explanations are ours. Not affiliated with or endorsed by USCIS.
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