Since the C.S. assimilated everyone in the ranks, there was no color chart for soldiers on the line, waggoneers, musicians, cooks, and so forth. I think the subject is somewhat demeaning to all soldiers because all these occupations contributed and made it possible to conduct warfare. Someone posted earlier about the role of slaves who willingly stayed home to raise crops. There is probably less certainty that slaves who built fortifications had much choice, but their contribution was immense. Black people, free and slave, overwhelmingly supported the Confederacy. Just because most did not run away, though they had ample opportunities, does not mean they did not want freedom. Their home was in the South and most remained here, even after WWII. Good for them, because if they had moved, their brains could be getting hosed in the public schools of Detroit, LA, Oakland, or Chicago.