| Term | Definition |
| Missouri Compromise | agreement proposed by Henry Clay that allowed Missouri to enter the Union as a slave state and Maine to enter as a free state; also outlawed slavery in any territories or states north of the 36'30 line |
| popular soverignty | before the Civil War, the idea that people living in a territopry had the right to decide by voting if slavery would be avoided there |
| Wilmont Proviso | proposed that in any territory that the US gained from Mexico should not have any slavery |
| Compromise of 1850 | Henry Clay's proposed agreement that allowed California to enter the Union as a free state and divided the rest of the Mexican Cession into two territories where slavery would be decided by popular sovereignty; also settled land claims between Texas and New Mexico, abolished the slave trade in Washington and produced a new Fugitive Slave Act |
| Uncle Tom's Cabin | novel about the evils of slavery and the injustice of the Fugitive Slave Law Written by Harrit Beacher Stowe |
| rural | refering to the countryside and the people living there |
| Sectionalism | loyality to ones own section of the country rather than to the nation as a whole |
| Dred Scott | Slave who sued for his freedom after being taken to live in a free state |
| Dred Scott decision | Supreme Court ruling that Missouri Compromise was unconstitutional and that slaves were property, not people and thus couldn't sue |
| seccession | the formal withdrawing of a state from the Union |
| Fort Sumter | US fort in the harbor of Charleston, SC, the Southern attack here began the Civil War |