This is a sad part of American history, and it gets to me.
There were blacks that picked the cotton too, and black concubines for the white rapist.
The black soldiers were not fighting for the rebel's racist cause. And even if you or others might believe that the poor ignorant blacks were actually fighting to maintain their own slavery then it makes the sins of the white rebels that much more
despicable and dastardly.
Do the pompous whites now say those black soldiers were free and fighting for their own slavery? or the slavery of their own race? Are now the racist whites of today pretending that they were slaves and fighting for the right to remain slaves?
The horrible African slavery was more then just forced physical servitude because the immoral whites psychologically abused the black people with beliefs of inferiority and breaking the black slaves as they do in breaking a horse so that the prisoners give up all of their human rights and their human dignity.
This is an example as to why many rightfully claim that the American African slavery damaged the black race in ways that still keep many of their decendants down to this day.
The self righteous whites broke the slaves will-power and broke their sense of pride and violated their sense of personhood, violated their families, violated their sexes, exploited their children, and even after the war was over the whites continued to degrade and to brake the decendants for another 100 years until the civil rights marches that began a process of repairing the extreme damage done by whites to the African Americans.
The civil rights reforms did not end the white bigotries but it did start the process and there is much more that needs done.