| A | B |
|---|
| The Missouri Compromise (1820), the Compromise of 1850, and the Kansas-Nebraska Act (1854) | were all efforts to settle disputes over the spread of slavery to the western territories |
| In the Compromise of 1850 and the Kansas- Nebraska Act of 1854 | proposed popular sovereignty in order to allow settlers in new territories to vote on the issue of slavery |
| Causes of Sectional Conflict | Nullification crisis; Kansas-Nebraska Act; Dred Scott v. Sanford; Election of Lincoln (1860) |
