..., the regular infantry, one bridge-train, a few squadrons of cavalry, and a small number of wagons; with them to push by a forced march to the vicinity of West Point, and then cross the Mattapony and Pamunkey rivers , thus compelling the evacuation of Yorktown, and perhaps cutting off Magruder's force in the Peninsula. Meanwhile the reserve artillery, the remaining cavalry, bridge-trains, and necessary wagons w...