All 128 questions · American History / C: Recent American History
2025 Civics Test · Question 100 of 128
Name one war fought by the United States in the 1900s.
En español: Mencione una guerra peleada por los Estados Unidos en los años 1900. — ver en español
Try to answer out loud first — then check
Accepted answers (USCIS M-1778)
- World War I
- World War II
- Korean War
- Vietnam War
- (Persian) Gulf War
Why this is the answerFive to choose from, all in one century. World War II is the one most people can hold onto, and it connects to several other questions on this test.
See it explained▶ The world wars and the Great DepressionFree short lesson on our YouTube channel — no signup, nothing to install.
This answer is free — here and everywhere else on the internet. Still having it in the interview room, out loud, in English, under pressure: that’s what Naturalizer trains.
In the Naturalizer app, this question is taught inside “The long arc” — American history from the colonies to today, told as one continuous thread. On the real test, an officer asks up to 20 of the 128 questions out loud; 12 correct answers pass.
The real test is oral — practice answering out loudFree to start — no card needed.
Free PDF: 10 study rules + all 128 questions with answers (English + Spanish)