| A | B | 
| Louisiana | First state carved out if the Louisiana Purchase | 
| Missouri | Joined the Union as a slave state | 
| Missouri to the Union problem | If admitted she would upset the balance of power in government | 
| 1819 | That year there were 11 free states and 11 slave states | 
| Northerners | They fought against Missouri being admitted to the Union | 
| Henry Clay | Proposed the Missouri Compromise | 
| Missouri Compromise | Admit Missouri as a slave state and Maine as a free state | 
| 36ยบ30'N | Slavery was allowed south of that latitude line and no slavery allowed north of it | 
| Missouri Compromise applied only to | Louisiana Purchase territory | 
| David Wilmot | he called on Congress to outlaw slavery in any land won from Mexico | 
| Wilmot Proviso | It wanted no slavery allowed in any land won from Mexico | 
| Sectionalism | a feeling of loyalty to one's state or section rather than to the whole country | 
| Mexican War | It strengthened feelings of sectionalism in the North and South | 
| Northern abolitionists | They demanded that slavery be abolished throughout the country | 
| white southerners | they demanded that slavery be allowed  everywhere even though many owned no slaves at all | 
| Popular sovereignty | means control by the people to vote whether they want slavery or not | 
| Free Soil Party | Political group formed because the Whig and Democratic parties refused to take a stand on slavery | 
| "Free soil, free speech, free labor, and free men" | slogan of Free Soil party | 
| keep slavery out of the western territories | Goal of the Free Soil Party | 
| Zachary Taylor | Won the Presidential campaign of 1848 |