Buford's cavalry units in the first day at Gettysburg acted largely as infantry, riding to the battle line, dismounting and firing from cover. The few Union cavalry units in the game, both Custer and the two Buford mounted units behave exactly as cavalry could in the face of line infantry, they disintegrate. My complaint is the rebel cav units are almost mythical in their capabilities when attacking Union infantry. Someone has bought the myth of southern cavalry as being super human. They certainly were resourceful as irregular troops raiding well away from the main combat and successful in containing Union cavalry in its scouting roll. The instances in which southern cavalry was successful against infantry was when Forrest used them much as Buford did - as mounted infantry. Just think about riding a horse at top speed for several hundred yards toward a line of people shooting rifles at you. Yes, cavalry charging infantry in UGG is pretty unrealistic. One quote I've always liked from a Civil War infantryman was "who ever saw a dead cavalryman?".