Obeying the authority of the State of South Carolina, when the War Between the States developed in 1861, the Washington Light Infantry formed themselves into three companies to remain through the war until 1865.
http://washingtonlightinfantry.org

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When South Carolina seceded from the Union in early 1861, the Washington Light Artillery reformed into three distinct companies and served in the Confederate Army during the American Civil War. One company became Company A of the Hampton Legion. A total of 414 men served in the unit during the war, 114 of which were killed.
http://en.wikipedia.org/wiki/Washington_Light_Infantry

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Rolls of the Washington Light Infantry in Confederate Service

Co. A. 25th Regiment S. C. V., Captains C. H. Simonton, James M. Carson

Co. A. Hampton Legion Infantry, Captains James Conner, T. M. Logan

Co. B. 25th Regiment S. C. V., Captains Edward W. Lloyd, Joseph S. Hanahan
https://archive.org/stream/rollsofwashingto00sout#page/4/mode/2up