James limited his question to Gettysburg and I have spent many hours visiting and walking that battlefield, tracing and retracing where these kinfolk were and what they did during that battle. But I had about as many more GGF's, GG Uncles and G. 1st cousins that fought from South Carolina from the tightknit loyalist Paletine-German community there, that for one reason or another didn't make it to Gettysburg.
My mother was of 100% German-Jewish ancestory even after these families being in America since before the American Revolution. I guess since 1945 that makes me some sort of mathamatical minority since most of my European relatives from Germany, Poland and the Ukraine were appearently wiped out, but that is besides the point here.
Anyway, one of my mother's G. Grandfather's 1st Cousin, (Henry Isaac Caughman) was even a signer of the South Carolina Ordinance of Secession, Dec. 20, 1860. So my mothers families from South Carolina was pretty heavily invested in the Southern Independence cause.