| A | B |
| Popular Sovereignty | Popularized by Democrat Stephen Douglas, idea that people in a territory should decide for themselves whether they should be slave or free |
| Ostend Manifest | Idea that US should buy Cuba from Spain for $120 million, or go to war for it. Cuba would become a slave state. |
| Free-Soil Party | Prelude to the Republican Party, against the spread of slavery in the Mexican Cession, felt slavery took jobs away from Whites. |
| Conscious Whigs | Members of the respective party that opposed slavery on moral grounds |
| Gadsden Purchase | Area of land in southern AZ and NM, important to the transcontinental RR, under Franklin Pierce's administration |
| Compromise of 1850 | Added CA as a free state, tougher fugitive slave law, popular sovereignty in Mexican Cession |
| Personal Liberty Laws | Passed by many states it the north, denied jails and courts for federal officials trying to capture slaves |
| Fugitive Slave Law | Part of Compromise of 1850, harsher treatment for runaway slaves, North held accountable for helping out runaway slaves |
| Kansas-Nebraska Act | Overturned the MO (1820) Compromise, popular sovereignty established for KS and NB |
| Uncle Tom's Cabin | Written by Harriet Beecher Stowe, very popular in the North, focused on slave families being torn apart |
| The Impending Crisis of the South | Banned and burned in the South, this book stated that non-slaveholding Whites were the ones that were hurt by slavery |
| Lawrence, Kansas | Free-soil city that was burned by pro-slavery individuals |
| Pottawatomie Creek | Led by John Brown in Kansas, killed many proslavery individuals in retaliation for Lawrence, KS killings. |
| Lecompton Constitution | People in KS could vote on a Constitution with or without slavery. If slavery was voted down, it would be protected for those already there. |
| Caning of Charles Sumner | Conflict between Northern Senator and S.C. Congressman, showed tensions in Congress between North and South |
| "Fire-Eaters" | Southerners that threatened secession if a Republican were elected president |
| Dred Scott v. Sanford | Supreme Court decision that stated Blacks were not citizens, Congress could not prohibit slavery |
| Freeport Doctrine | Argument by Stephen Douglass that states could, in theory, limit slavery; caused a split in the Democratic Party |
| Harpers Ferry | Desire to start a massive slave rebellion, 7 people killed, led to execution of John Brown, South afraid of future attacks |
| John Brown | Radical abolitionist, responsible for death of many in his desire for abolition. Hated by South, major cause of Civil War. |