1. Name one war fought by the United States in the 1800s.
ANSWER: The Civil War.
2. Name the U.S. war between the North and the South.
ANSWER: The Civil War.
3. Name one problem that led to the Civil War.
ANSWER: Slavery, economic reasons, and states' rights.
4. How many people died during the Civil War?
ANSWER: About 970,000.
5. How many slaves were freed in 1865?
ANSWER: About four million.