Why did the United States enter World War I?

Question 101 of 128 · Recent American History

Accepted answers

Because Germany attacked U.S. (civilian) ships
To support the Allied Powers (England, France, Italy, and Russia)
To oppose the Central Powers (Germany, Austria-Hungary, the Ottoman Empire, and Bulgaria)

Explanation

The United States entered World War I in 1917 because Germany attacked U.S. ships, and to support the Allied Powers against the Central Powers (Germany, Austria-Hungary, the Ottoman Empire, Bulgaria).

Source: USCIS 2025 Civics Test — 128 Questions and Answers (PDF).

Last verified against USCIS on 2026-08-25.