The 1900s and after: the world wars, the Great Depression, the Cold War, the civil rights movement and September 11, 2001.
The 2025 version has 19 questions in this section; the 2008 version has 10. Each question below shows the official accepted answers and, where USCIS explains it, a short excerpt from a USCIS study guide. Practise just this topic with the quiz.
Questions about current officials and your own state are not in the quiz — those answers change. Check them on your state page and on uscis.gov. Full test: free practice test.
For applicants who filed Form N-400 on or after October 20, 2025. Answers are copied from the official USCIS list (M-1778); any one accepted answer is enough.
Name one war fought by the United States in the 1900s.
World War I is one war fought by the United States in the 1900s.
Why did the United States enter World War I?
When did all women get the right to vote?
In 1920, the 19th Amendment to the Constitution gave women the right to vote.
What was the Great Depression?
The Great Depression was the worst time for the U.S. economy in American history.
When did the Great Depression start?
He was elected during the Great Depression, which was a period of economic crisis after the stock market crash of 1929.
Who was president during the Great Depression and World War II?
Franklin Roosevelt was President during two important periods in American history. He was President during the Great Depression and World War II.
Why did the United States enter World War II?
On December 7, 1941, Japan attacked the United States at a U.S. naval base in Hawaii called Pearl Harbor. During World War II, the U.S. fought Japan, Germany, and Italy.
Dwight Eisenhower is famous for many things. Name one.
In 1953, Dwight Eisenhower became the 34th President of the United States. Before he was President, Eisenhower was a general in World War II.
Who was the United States' main rival during the Cold War?
After World War II, the United States and the Soviet Union became involved in the Cold War.
During the Cold War, what was one main concern of the United States?
During the Cold War, the main concern of the United States was the spread of communism.
Why did the United States enter the Korean War?
The U.S. wanted to stop other countries around the world from becoming communist.
Why did the United States enter the Vietnam War?
The U.S. wanted to stop other countries around the world from becoming communist.
What did the civil rights movement do?
The movement to end racial discrimination in the United States is called the Civil Rights Movement.
Martin Luther King, Jr. is famous for many things. Name one. 65/20
For example, Martin Luther King, Jr., fought for civil rights. He was a leader in the Civil Rights Movement who organized peaceful protests against racial discrimination and laws that separated people by race.
Why did the United States enter the Persian Gulf War?
What major event happened on September 11, 2001 in the United States? 65/20
On September 11, 2001, terrorists attacked the United States. Terrorists hijacked four airplanes.
Name one U.S. military conflict after the September 11, 2001 attacks.
Name one American Indian tribe in the United States.
For a complete list of tribes, please visit bia.gov.
Native Americans are also called American Indians. Today, there are over 500 American Indian tribes in the United States.
Name one example of an American innovation.
In 1969, the U.S. became the first country to land a person on the moon.
For applicants who filed Form N-400 before October 20, 2025. Answers are from the official USCIS list (rev. 08/21).
Name one war fought by the United States in the 1900s. 65/20
The United States fought five wars in the 1900s: World War I, World War II, the Korean War, the Vietnam War, and the (Persian) Gulf War.
Who was President during World War I?
Woodrow Wilson was the 28th president of the United States. President Wilson served two terms from 1913 to 1921. During his first term, he was able to keep the United States out of World War I.
Who was President during the Great Depression and World War II?
Franklin Delano Roosevelt (FDR) was president of the United States from 1933 until 1945. He was elected during the Great Depression, which was a period of economic crisis after the stock market crash of 1929.
Who did the United States fight in World War II?
The Japanese bombed U.S. naval bases in a surprise attack on Pearl Harbor, Hawaii, on December 7, 1941. The next day, President Franklin D. Roosevelt, as commander in chief of the military, obtained an official declaration of war from Congress.
Before he was President, Eisenhower was a general. What war was he in?
Before becoming the 34th president of the United States in 1953, Dwight D. Eisenhower served as a major general in World War II. As commander of U.S. forces and supreme commander of the Allies in Europe, he led the successful D-Day invasion of Normandy, France, on June 6, 1944.
During the Cold War, what was the main concern of the United States?
The main concern of the United States during the Cold War was the spread of communism. The Soviet Union (Union of Soviet Socialist Republics, or USSR) was a powerful nation that operated under the principles of communism.
What movement tried to end racial discrimination?
The modern civil rights movement in the United States began in 1954 when the Supreme Court ruled that racial segregation in public schools was unconstitutional.
What did Martin Luther King, Jr. do? 65/20
Martin Luther King, Jr. was a Baptist minister and civil rights leader. He worked hard to make America a more fair, tolerant, and equal nation. He was the main leader of the civil rights movement of the 1950s and 1960s.
What major event happened on September 11, 2001, in the United States?
On September 11, 2001, four airplanes flying out of U.S. airports were taken over by terrorists from the Al-Qaeda network of Islamic extremists. Two of the planes crashed into the World Trade Center’s Twin Towers in New York City, destroying both buildings.
Name one American Indian tribe in the United States.
USCIS Officers will be supplied with a list of federally recognized American Indian tribes.
American Indians lived in North America for thousands of years before the European settlers arrived. Today there are more than 500 federally recognized tribes in the United States.
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