| A | B |
| Compromise of 1850 | Agreement designed to ease tension caused by the expansion of slavery into western territories. |
| Fugitive Slave Act | Part of the Compomise of 1850, a law ordering all citizens of the United States to assist in the return of slaves. |
| nativism | A policy of favoring native-born Americans over immigrants. |
| Kansas-Nebraska Act | 1854 law that called for the creation of these two new territories, and stated that the citizens in each territory should decide whether slavery would be allowed there. |
| popular sovereignty | Policy of letting the people in a territory decide whether slavery would be allowed there |
| free soiler | Person dedicated to preventing the expansion of slavery into the western territories |
| Dred Scott v. Sandford | 1857 Supreme Court decision that stated that slaves were not citizens; that living in a free state or territory, even for many years, did not free slaves; and declared the Missouri Compromise unconstitutional |
| Lincoln Douglas Debate | A series of seven debates between Abraham Lincoln and Stephen A. Douglas on the issue of slavery in the territories. |
| arsenal | Place where weapons are made or stored |
| Border States | In the Civil War, the states between the North and South: Delaware, Maryland, Kentucky, and Missouri |
| Lower South | States of Texas, Louisiana, Mississippi, Alabama, Florida, Georgia, and South Carolina |
| secessionist | Person who wanted the South to secede |
| Confederate States of America | Association of seven seceding Southern states, formed in 1861 |
| Fort Sumter | Federal fort in the harbor of Charleston, South Carolina; the Confederate attack on the fort marked the start of the Civil War |
| Upper South | Designation used in the Civil War encompassing the states of Virginia, North Carolina, Tennessee, and Arkansas |