| A | B |
| free state | a state in which slavery was not allowed |
| slave state | a state in which slavery was allowed |
| sectionalism | loyalty to one region of a country instead of to the whole country |
| fugitive | a person who runs away or escapes |
| civil war | a war between regions or groups of people in the same country |
| Underground Railroad | a network of secret escape routes enslaved African Americans followed to reach freedom in the North |
| popular sovereignty | a system that allowe people in a territory to make their own decisions |
| extremist | a person whose opinions are very different from those of most people |
| secede | to break away from, as a state leaving the Union |
| abolitionist | a person who wanted to end slavery |