Hi, Pelham!
Interesting. I had no idea! I do know that many blacks went into war with their confederate owners - and we have photos that show that.
What a time, eh?
Including William Mack Lee, who had been the general’s personal cook and ‘body servant’. He wrote a book about his time with Lee, I think this is probably it:
https://docsouth.unc.edu/neh/leewilliam/lee.html