If the Confederacy had won at the Battle of Gettysburg

[McNukes™ #NYCMMWasAHero]

The South would've won had it successfully seized enough Northern supplies. Had Maryland and Delaware seceded, the Northern wargoal would have shifted to controlling the border states, and had the South invaded and conquered Philadelphia from Gettysburg, the war could end early. The impact of the lack of the Emancipation Proclamation cannot be understated as a factor either; if Lincoln hadn't issued this, then at least one or two Reconstruction Amendments would have never occurred, if not all three.