| Term | Definition |
| Manifest Destiny | belief that U.S. should expand all the way to the Pacific Ocean |
| Annexation | to take on a territory as part of your own country |
| Compromise of 1850 | agreement that allowed California to be admitted as a free state, set the Texas-New Mexico border, allowed popular sovereignty in some regions for decision of slavery, made Fugitive Slave Act, and outlawed buying and selling of slaves, but not slavery itself, in the capital |
| Fugitive Slave Act | law that made it a crime to help runaway slaves and allowed the arrest of escaped slaves |
| Popular Sovereignty | the vote of residents to make a decision |
| Kansas-Nebraska Act | law that organized Kansas and Nebraska territories and made popular sovereignty the way to decide the issue of slavery |
| Lincoln-Douglas Debates | debates between Lincoln and Douglas when they were both running for the senate |
| Jefferson Davis | president of the Confederacy, or the South |
| Expansion | increasing territory |
| Bleeding Kansas | name for Kansas because so much violence over the issue of slavery occurred there |
| Dred Scott Decision | Supreme Court said this man was not free despite living all his life on free-soil because the 5th amendment protects property rights of slaveholders |
| John Brown | abolitionist who carried out a raid on Harpers Ferry, Virginia and was executed |
| Lower South | Mississippi, Florida, Alabama, Georgia, Louisiana, Texas, and South Carolina |
| Fort Sumter | first place where fighting occurred in the Civil War |
| Border States | slave states still loyal to the Union, formed a border between the Union and the Confederacy |
| Emancipation Proclamation | document that freed all slaves in rebellious areas |
| Andrew Johnson | Lincoln's vice president |
| Thirteenth Amendment | amendment which ended slavery in America |
| Sherman's March to the Sea | Sherman's and his troops's march across Georgia |