| A | B |
| Wilmot Proviso | Bill that would ban slavery in the territories acquired from the War with Mexico |
| secession | Decision by a state to leave the Union |
| Compromise of 1850 | Series of measures that were intended to settle the disagreements between free states and slave states |
| popular sovereignty | Idea that people living in a territory should make their own decisions, especially the decision to admit slavery |
| Stephen A. Douglas | Illinois senator who worked to pass the Compromise of 1850, but later introduced the idea of popular sovereignty |
| Millard Fillmore | 13th president who supported the Compromise of 1850 |
| Fugitive Slave Act | Law that provided for harsh treatment for escaped slaves and for those who helped them |
| personal liberty laws | Laws passed by Northern states forbidding the imprisonment of escaped slaves |
| Underground Railroad | Secret network of people who hid fugitive slaves escaping north to freedom |
| Harriet Tubman | Famous "conductor" on the Underground RR |
| Harriet Beecher Stowe | Author of the antislavery novel "Uncle Tom's Cabin" |
| Uncle Tom's Cabin | A widely read antislavery novel |
| Kansas-Nebraska Act | Law that split Nebraska into the territories of Nebraska & Kansas and allowed for popular sovereignty |
| John Brown | Fierce opponent of slavery that led a raid killing 5 proslavery people |
| Bleeding Kansas | Nickname given to Kansas territory because of the bloody violence there |
| Franklin Pierce | 14th President & a democrat |
| nativism | Favoring native-born people over immigrants |
| Know-Nothing Party | Political party formed to stop the influence of immigrants |
| Free-Soil Party | Political party formed to oppose extending slavery in the territories |
| Republican Party | Political party formed to oppose extending slavery in the territories |
| Horace Greeley | Newspaper editor who strongly supported the newly-formed Republican Party |
| John C. Fremont | Republican candidate in the 1856 presidential election |
| James Buchanan | 15th President & democrat with national support |
| Dred Scott | Slave who was briefly taken by his owner into free territory |
| Roger B. Taney | Chief Justice who wrote the ruling in the Dred Scott case |
| Dred Scott v Sandford | Supreme Court ruled that being in a free state did not make a slave free. He was still property and the government cannot take away property without just compensation. |
| Abraham Lincoln | President during the Civil War |
| Freeport Doctrine | Idea that any territory could ban slavery by simply refusing to pass laws to support it. |
| Harpers Ferry | Location of federal arsenal that John Brown raided to get guns to arm slaves. |
| Confederacy | Confederate States of America, formed in 1861 by the Southern states that seceded from the Union. |
| Jefferson Davis | President of the Confederacy |