Confederate General James Longstreet. Lee's right hand man, especially after the loss of "Stonewall" Jackson. Lee called my "Old War Horse" but Longstreet strongly disagreed with about Pickett's charge at Gettysburg and after the war criticized Lee for the decision. Longstreet was never forgiven in the South for criticizing Robert E. Lee.
About 200,000 blacks fought for the Union after being officially allowed to become soldiers with the signing of the Emancipation Proclamation in 1863, but there were a few thousand who fought for the Confederacy.