The Confederate States of America (CSA), commonly referred to as the Confederate States or simply the Confederacy, was an unrecognized breakaway republic in North America that existed from February 8, 1861, to May 9, 1865. The Confederacy comprised U.S. states that declared secession and warred against the United States during the ensuing American Civil War. Eleven U.S. states declared secession from the Union and formed the main part of the CSA. They were South Carolina, Mississippi, Florida, Alabama, Georgia, Louisiana, Texas, Virginia, Arkansas, Tennessee, and North Carolina. Kentucky and Missouri also had declarations of secession and full representation in the Confederate Congress during their Union army occupation.