| Term | Definition |
| Fort Sumpter | Fort in Charleston Harbor, South Çarolina, site of the 1st battle of the Civil War in 1861. |
| Jefferson Davis | President of the Confederacy during the Civil War and former U.S. Senator from Mississippi. |
| secede | To break away from a group, as the southern states broke away from the U.S. in 1861. |
| Confederacy | Confederate States of America formed by the eleven southern states that seceded from the Union after Abraham Lincoln was elected President. |
| Union | States that remained loyal to the U.S. government during the Civil War. |
| border state | During the Civil War, a state located between the Union and the Confederacy that allowed slavery but remained in the Union. |
| Civil War | war between people of the same country |