ocr: Confederacy is Formed. On December 20,1860, South Carolina seceded from the Union. By May 20,1861,101 more states had seceded or passed ordinances ofsecession. Fourk border states-Missouri, Kentucky, Maryland, and Delaware-remained in the Union, even thoughi many residents supported the South. In February1861,Jefferson Davis was chosenas president of the Confederate States of America. On May 20,1861,the Confederate capital was movedfrom Montgomery, Alabama, to Hichmond, Virginia.