I know that 6000 blacks are known to have served in the Confederate Armies from Texas,both on the frontier, and in other capacities. And before you call me a "crackpot", Neo-Confed, or other insulting name, I hold a Masters in American & Texas History.....There are also documented accounts of blacks marching with Lee's Army into Maryland, (armed). The most famous account was written by Fredrick Douglass.....
I have been hearing that for years, and yet there is no documented record of Union troops seeing any, no documents of Southern troops marching with or fighting alongside them. Southern white soldiers were aghast at the idea the North would allow blacks to be soldiers it seems incomprehensible they would then march beside them. Further, there was a huge debate in the South about letting blacks fight for the South and it was rejected. How is it they could be debating something that was already a done deal. There is a lot of data to suggest that Southern army morning reports tended to list anyone in the army or working for the army as being "soldiers" even if they weren't actually in the army. We know a lot of black slaves accompanied the Southern armies to do a lot of the manual labor and some have speculated this may be the error.