Lee served as the General for the Union Army of Virginia instead? Judging from what history currently tells us about the fact that despite ending in his surrender and ultimate defeat of the Confederacy, Lee still had a huge impact in the sense that he helped make the Civil War not a complete curbstomp battle, and as a result Lee having control of much better armed troops against the Confederacy minus a whole state would probably turn the Civil War into very much a complete curbstomp battle. Heck, not only Lee, but with Virginia being part of the Union in this hypothetical alternate timeline the Confederacy would also lose out on ‘Stonewall’ Jackson thus making them not have either of their two ‘big boys’ to rally under, making morale not as strong as it could be. Granted, maybe in this timeline some unknown Joe Schmo ends up being as influential as the actual Lee and Jackson, but who’s to