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Question 100 of 128 · 2025 test

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

2025 test

2025 test · also on the 2008 test as #78

This question is from the 2025 test, which applies if you filed Form N-400 on or after Oct 20, 2025: the officer asks up to 20 of the 128 questions and 12 correct answers pass. Earlier filers take the 2008 test - check your version on the official USCIS test-updates page.

5 accepted answers

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

On the 2008 test

The 2008 test asks this as Question 78, in the same words.

The 2008 question lists the same 5 answers.

Background

U.S. wars in the 1900s include World War I, World War II, the Korean War, the Vietnam War, and the Gulf War. These conflicts defined America's role as a global power in the 20th century.

From this site's page for 2008 Question 78.

The 65/20 special consideration

Question 100 is not one of the 20 asterisked questions, so an applicant who qualifies for the 65/20 special consideration would not be asked it. Everyone else studies all 128.

Answers that get mixed up with this one

These are the wrong options the 2025 practice test puts beside this question. Each one is the correct answer to a different 2025 question.

More Recent American History and Other Important Historical Information questions

Question and answers from the USCIS document 128 Civics Questions and Answers (2025 version), M-1778 (09/25), U.S. government public domain.