| A | B |
| Wilmot Proviso | territory aquired from Mexican War would be free from slavery |
| secession | to leave the union |
| Compromise of 1850 | California enters as a free state |
| popular sovereinty | Majority rules in a vote |
| Fugitive Slave | Law requiring northerners to aid in returning runaway slaves |
| underground railroad | secret passage to the north for runaway slaves |
| Uncle Tom's Cabin | written by Harriet Beecher Stowe |
| Kansas Nebraska Act | Allowed popular sovereignty to determine slave status |
| Bleeding Kansas | fighting in Kansas |
| Free Soil Party | wanted to stop the spread of slavery to the west |
| Republican Party | political party of Lincoln |
| Harpers Ferry | John Brown attacked in hopes of leading a slave rebellion |
| abolition | the ending of slavery |
| antebellum | period of time before the civil war |