Suppose it won, I am going to assume 1865 as Lincoln wouldn't have given up. So Little Mac wins and is assassinated and George Pendleton takes over. Being little more than a traitor he hands back everything to the CSA outside of WV. This is close to a best case scenario for the South. Let's say Sherman is at Milledgeville, Georgia when the war ends. I think that the CSA would be in such a mess it would take until at least 1900 before it is back where it was before the war.