| A | B |
| John Brown's Raid | attack on Harpers Ferry, Virginia arsenal |
| John C. Breckinridge | democrat who ran for president in 1860 from Kentucky |
| Constitutional Union Party | party that supported no principles other than the Constitution |
| John Bell | Constitutional Party candidate for president in 1860 from Tennessee |
| secession | formally withdrawing from the Union |
| Confederate States of American | states that seceded from the union in 1861 |
| Jefferson Davis | president of the Confederacy |
| John J. Crittenden | senator from Kentucky who proposed amendments to protect slavery |