...as the White Oak swamp. In their rear Keyes was in reserve. On the north or left bank of the Chickahominy Fitz John Porter's corps was still stationed, near Gaines Mill, with McCall's division of Pennsylvania reserves at Mechanicsville and on Beaver Dam Creek-eleven divisions in all. Richmond, Mc-Clellan's coveted prize, was but five miles away. To reach it he had to pass over the lines of the Army of N...