The 13 states that made up the Confederate States of America were North Carolina, South Carolina, Georgia, Mississippi, Louisiana, Alabama, Texas, Florida, Virginia, Tennessee, Arkansas, Kentucky and Missouri. Kentucky and Missouri never officially seceded from the Union. However, they were recognized by the Confederacy and were represented by two stars on the Confederate flag.
South Carolina was the first state to secede from the Union, on December 20, 1860. Six states followed over the next four months. After the Civil War started at Fort Sumter on April 12, 1861, Arkansas, North Carolina, Tennessee and Virginia joined the Confederacy. Jefferson Davis was the president of the Confederacy. The states rejoined the Union after the war ended in 1865, and Georgia was the last to rejoin.