Question 91: Name one war fought by the United States in the 1800s.
Official answers (any one counts)
USCIS accepts any of these answers. If the question asks for more than one, give as many as it asks.
- War of 1812
- Mexican-American War
- Civil War
- Spanish-American War
Grandpa explains
Four wars, kiddo: War of 1812, Mexican-American War, Civil War, and Spanish-American War.
Careful: these are NOT the answer
These are the common mix-ups. The app uses them as traps so you practice.
- World War I
- Revolutionary War
- Korean War
On the 2008 test this is question 72
If you filed your N-400 before October 20, 2025, you take the 2008 version. Which one is mine?
Name one war fought by the United States in the 1800s.
- War of 1812
- Mexican-American War
- Civil War
- Spanish-American War
Video lesson on this topic: The 1800s
More questions on this topic
- 92Name the U.S. war between the North and the South.
- 93The Civil War had many important events. Name one.
- 94Abraham Lincoln is famous for many things. Name one. ★
- 95What did the Emancipation Proclamation do?
- 96What U.S. war ended slavery?
- 97What amendment says all persons born or naturalized in the United States, and subject to the jurisdiction thereof, are U.S. citizens?
Official sources:
- USCIS · 128 Civics Questions and Answers (2025 version), M-1778 (09/25) ↗ · checked October 6, 2026
The plain explanation is ours; the official answers are USCIS's, word for word.