Col. Parkhurst’s (Northern) Account of Forrest’s Black Confederates:
"The forces attacking my camp were the First Regiment Texas Rangers, a battalion of the First Georgia Rangers … and quite a number of Negroes attached to the Texas and Georgia troops, who were armed and equipped, and took part in the several engagements with my forces during the day"
(Lieutenant Colonel Parkhurst's Report (Ninth Michigan Infantry) on General Forrest's attack at Murfreesboro, Tennessee, July 13, 1862, in Official Records, Series I, Vol XVI, Part I, page 805).
And again, had the confederacy won their rebellion, if any of them had been slaves during the conflict then they would still be slaves after the conflict was over, unless their owners freed them for their services. And while I don't think that Texas had the same "boot 'em out" constitution that Virginia had, those freed slaves would not be citizens of the confederacy, could never run for political office in the confederacy, and would have no rights that a white man was bound to respect.
Somehow Williams glosses right over that part.
just been reading about this and it says the yankees were so surprised to see black fighting for the confederacy, after that battle is became wildly known that blacks did fight west of the river of which was already known east of it .