Question 100 of 128

Name one war fought by the United States in the 1900s.

Q: Name one war fought by the United States in the 1900s.

World War I · World War II · Korean War · Vietnam War · (Persian) Gulf War — Topic: American History — Recent American History and Other Important Historical Information. USCIS accepts any one of the answers listed below.

Official USCIS answers (in English)

World War I
World War II
Korean War
Vietnam War
(Persian) Gulf War

How to answer

Topic: American History — Recent American History and Other Important Historical Information.

USCIS accepts any one of the answers listed below.

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Source: USCIS, 128 Civics Questions and Answers (2025 version), form M-1778 (09/25). Answers that can change are listed at uscis.gov/citizenship/testupdates. Freedom to Belong is an educational nonprofit and is not affiliated with USCIS.