In reviewing great battles and campaigns it is important to bear these things in mind, and, for the credit of a brave soldiery, to remember that all dispositions of troops are made by men higher up. The skill and alertness of those men higher up, or their lack of skill and alertness, determines whether or not due advantage is to be taken of numbers, the nature of the ground and other adventitious circumstances upon which the outcome of battles in a large measure depends.
At Chancellorsville, for example, there was one position so favorable that the artillery of either army, posted there upon the crest of a commanding hill, could work havoc in the ranks of its adversary. The Federals held that position when night fell on Saturday. They unwisely abandoned it during the night and early in the morning Stuart, always quick to see and alert to seize advantage, occupied it with thirty guns too strongly supported to be dislodged. In like manner the superior generalship of the Confederates at other points enabled them often to bring two men to bear against one in spite of their general inferiority of numbers.
When Hooker found his right wing crushed and reduced to a panic-stricken mass of fugitives, he still had the battle in his own hands and victory easily within his grasp.
After Jackson's blow was delivered on Saturday evening Hooker could not have doubted that Lee's little army of less than forty thousand men had been divided in his front. It was his obvious and easy task to keep it divided and to crush its two parts separately. He had already thrust Sickles in between Lee and Jackson, and in order to maintain the separation he had only overwhelmingly to reinforce Sickles, an enterprising officer. This he might easily have done by drawing troops from his completely unemployed left wing which stretched away superfluously to the fords of the river with no enemy at all in front.
The war problem was simple and easy at that time, and had Hooker been a man of masterful mind, he must have wrought it out to checkmate within twenty-four hours.
But it is to be remembered that Lee knew all old army officers, and knew the capacity and temper of every commander sent to oppose him. It is probable that had Hooker been a man of masterful mind, Lee would never have attempted the strategy which created this opportunity.
Let us leave speculation for facts. Hooker had unaccountably abandoned his brilliant offensive movement at the crowning moment when its success, complete and decisive, seemed certain. Having come out to force Lee to a fight in the open, he had shrunk from the conflict. Having skilfully and brilliantly so maneuvered as to place himself on the flank of Lee's army with intent to assail and overwhelm his adversary, he had suddenly shrunk back, as if appalled, into a defensive attitude and had left it to Lee to determine when and where and how the further fighting should be done. Having advanced from Chancellorsville into the more favorable country beyond, he had quite inexplicably fallen back to Chancellorsville again and fortified there as if he had been confronted by an adversary of superior strength, and when he clearly saw that Lee had divided his inferior force, he had over-confidently assumed that retreat was intended instead of a blow.
But even after the blow had been delivered, with staggering effect, Hooker had the war game in his own hands. It was his obvious policy to order fifty or sixty thousand men or more from his unemployed left wing, to Chancellorsville, to fall destructively upon each of Lee's widely separated detachments, with the purpose of crushing them both.
He did nothing of the kind. Instead he stood upon the defensive against Lee in front and Stuart upon his flank, and utterly failing to prevent a junction between these two he retired still further and stood upon the defensive again to receive their joint assault.
In the meantime he had unemployed troops in vastly superior numbers, lying idly upon his left. Instead of ordering them into the conflict he waited for Sedgwick, who was coming up after driving the Confederates out of their works at Fredericksburg, to save him from defeat and disaster.