Order of Secession During the American Civil War
| State | Date of Secession |
| South Carolina | December 20, 1860 |
| Mississippi | January 9, 1861 |
| Florida | January 10, 1861 |
| Alabama | January 11, 1861 |
| Georgia | January 19, 1861 |
| Louisiana | January 26, 1861 |
| Texas | February 1, 1861 |
| Virginia | April 17, 1861* |
| Arkansas | May 6, 1861* |
| North Carolina | May 20, 1861* |
| Tennessee | June 8, 1861* |
* These four states seceded after Fort Sumter (April 12, 1861).
In all 11 states seceded from the Union. Five more states were Border Slave States that did not seceded from the Union: Missouri, Kentucky, West Virginia, Maryland and Delaware.
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