I agree, and don't necessarily argue against that point. For the purposes of the realities of the time period, my point is that I don't think that we should assume based on looks (not that you're saying this) that mixed race black-white soldiers considered themselves to be white, particularly given the history of the country at the time. If we find evidence that an individual listed as "black" on a civil war schedule actually self-identified as white, then I don't think we should call that person black. However, absent such declarations, I don't think we have enough to call soldiers who are otherwise listed as black and among "colored" civil war troops as anything but. Also, in the event that it is clear that particular mixed race black-white soldiers identified as white over black, I think that we should also be clear about, for historical purposes, why they were listed as being black in the first place.