All of my ancestors who fought in the Civil War were on my mother's side (my dad's family was still in Europe at the time), and most fought for the South. A large portion came from Walkin County, Georgia and served either in the 2nd Georgia Cavalry under Forrest and Wheeler or in the 16th Georgia Infantry of Cobb's Legion, which served in McLaw's Division of Longstreet's Corps. Others were in Texas and served in McCord's Frontier Cavalry (46th Texas Cavalry), where they guarded the northwestern frontier for just over a year before heading down to Galveston to help prevent the Federals from recapturing the port (it had surrendered in October, 1862 but had been recovered on January 1, 1863).
My mom has been doing a lot of geneology research recently and has found at least five of my ancestors who died in the Civil War. One was killed during a cavalry skirmish in Tennessee in 1863; another was mortally wounded during the Battle of Crampton's Gap at South Mountain, Maryland; two others died of illness in Richmond hospitals; and a fifth was captured at Cold Harbor and was sent to a Union POW camp in Elmira, New York, where he died of diptheria just a few months later (he is buried in the National Cemetery there at Elmira and I plan on driving up there next year during my trip to Gettysburg and Antietam).
