Question 111
A growing nation
Why did the United States enter the Vietnam War?
The United States fought in the Vietnam War (1955-1975) to stop the spread of communism from North Vietnam to South Vietnam. During the Cold War, America followed the “domino theory” – leaders believed that if one country became communist, neighboring countries would follow.
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A growing nation
Name one U.S. military conflict after the September 11, 2001 attacks.
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What group of people was taken to America and sold as slaves?
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Who was the United States’ main rival during the Cold War?
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Section "Learn and Explore" uses official instructions and media files of US Citizenship and Immigration Services, US National Museum of American History, The Smithsonian Institution and other governmental and public organization.