Question 106 of 128

Why did the United States enter World War II?

Official USCIS answers

(Bombing of) Pearl Harbor
Japanese attacked Pearl Harbor
To support the Allied Powers (England, France, and Russia)
To oppose the Axis Powers (Germany, Italy, and Japan)

Why this is the answer

On December 7, 1941, Japan attacked Pearl Harbor in Hawaii. This attack made the United States declare war and join the Allied Powers against the Axis Powers.

💡 Memory tip: Remember: Pearl Harbor pulled the U.S. into World War II.

Could you say it out loud to an officer?

Practice with the real rules: 20 questions, pass with 12.

Take a free mock test

← 105 107 →

More from Recent American History and Other Important Historical Information

100. Name one war fought by the United States in the 1900s.
101. Why did the United States enter World War I?
102. When did all women get the right to vote?
103. What was the Great Depression?
104. When did the Great Depression start?
105. Who was president during the Great Depression and World War II?

Source: USCIS, 128 Civics Questions and Answers (2025 version), M-1778.