On 23 May 1788.
South Carolina was admitted to the Union on May 23, 1788.
South Carolina
Admission to the Union: May 23, 1788 (8th)
Seven (7) states entered the Union before South Carolina. The province of South Carolina was one of the original 13 colonies. It was admitted to the Union on May 23, 1788 as the 8th US state.
Texas, Louisiana, Mississippi, Alabama, Florida, and Georgia were the six states that joined South Carolina in seceding from the Union.
Only one state seceded in 1860, South Carolina.
South Carolina seceded from the Union primarily due to their belief in states' rights and the protection of slavery as an institution.
Eleven states seceded from the union to create the Confederate States of America. They were Alabama, Arkansas, Tennessee, Mississippi, Florida, Georgia, Texas, North Carolina, South Carolina, Louisiana and Virginia.
South Carolina seceded because they believed that the institution of slavery was in peril. I believe the Civil War was about states rights - that is, the states rights to maintain slavery. South Carolina was complaining about the northern states violating the Constitution by not enforcing the Fugitive Slave Act. The union felt that South Carolina was independent and did not want slavery so now they are in war.
South Carolina was a slave state. South Carolina was one on the eleven states that seceded from the union to create the Confederate States of America. They were Alabama, Arkansas, Tennessee, Mississippi, Florida, Georgia, Texas, North Carolina, South Carolina, Louisiana and Virginia.
South Carolina was the first to secede.
Based on the election of Abraham Lincoln to the US presidency, South Carolina left the Union on December 20, 1860.