Question 110 of 128 American History
Why did the United States enter the Korean War?
Answers USCIS accepts
- To stop the spread of communism
Give any one of these answers at your interview.
The United States entered the Korean War to stop the spread of communism.
What it means
In 1950, communist North Korea invaded South Korea. The U.S. and United Nations forces defended the South. The war ended in an armistice in 1953.
Say “to stop the spread of communism.”
Memory tip: Korea and Vietnam: same answer, stop communism.
Quiz yourself
Why did the United States enter the Korean War?
Multiple choice is for study only. The real civics test is spoken: the officer asks, you answer out loud.
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Official source: USCIS M-1778 (09/25), 128 Civics Questions and Answers (2025 version). Last checked: .