...of the position were with the attack, and not the defence, as any practical soldier will say, who will carefully examine the ground. General McClellan said officially: The force opposed to me was D. H. Hill 's division (15,000 men), and a part, if not the whole of Longstreet's, and, perhaps, a portion of Jackson's. Probably thirty thousand in all. It is always safe to give a divisor of three to any est...