Forrest never had a Robert E. Lee to appreciate and exploit his talents as Lee did with Jeb Stuart.
If Lee had had Forrest, Stuart and Jackson at Gettysburg.............
The South would have lost the war much faster, due to the complete and total occupation of every CSA state west of the Alleghenies.
I disagree with that.
Had Lee's invasion of the north been successful disHonest Abe would have pulled troops out of the west to try to repel the South. (Actually, Newt Gingrich exploits this very theory in the third of his WBTS books, Grant Comes East.)
Also, Gettysburg was not a rout by the north. Had Stuart been there from the beginning, Lee would have been able to complete his mission, which was to push to Harrisburg, Pennsylvania, or even Philadelphia, to influence northern politicians to give up their prosecution of the war.