This group split from the main national body of Presbyterianism largely over the issue of slavery and was known during the American Civil War as the Presbyterian Church in the Confederate States of America.
This group split from the main national body of Old School Presbyterianism after the Gardiner Spring Resolutions passed at the May 1861 General Assembly denouncing secession as an act of treason. During the American Civil War the denomination was known as the Presbyterian Church in the Confederate States of America.