The nature of the position rendered this plan impracticable for producing any important result. Had McPherson broken the road ever so "good" and then fallen back to the Gap as ordered, Johnston could have moved his main army to Resaca that night, and at daylight the next morning Sherman would have found in the enemy's trenches at Dalton only a skirmish-line which would have leisurely retreated before him to the new position at Resaca. The result would have been essentially the same as that which was actually accomplished.
Indeed, as it now seems clearly to appear to General Sherman, the only possible mode of striking an effective blow at Dalton was to capture Resaca or seize and hold a point on the road in rear of Dalton, and not to break the road and fall back as McPherson was ordered to do. If Sherman had seen this clearly at the time, it is inconceivable that he would have sent less than one fourth of his army to execute the all-important part of the plan. And now he judges McPherson as manifesting timidity ( 2) because he did not at the critical moment attempt to accomplish, with his comparatively small force, what Sherman should have ordered to be done by a much larger force.
A very bold, independent commander might have attempted, whether successful or not, what Sherman thinks McPherson ought to have done at Resaca; and, as Sherman says, such an opportunity does not occur twice in the life of any man. But McPherson was a subordinate in spirit as well as in fact, and cannot fairly be charged with timidity for not attempting what he was not ordered to do, and what, in fact, was no part of the plans of his superior so far as they were indicated in his orders.
If McPherson had assaulted Resaca, it is possible, but only possible, that he might have succeeded. There were some cases during the Civil War where intrenchments hastily constructed and imperfectly defended were carried by assault; many more where the assault failed; and, I believe, not one case where intrenchments carefully prepared in advance, with obstructions in front, and defended by a force commensurate with the extent of the line, like those at Resaca, were successfully assaulted.
It is true that McPherson's force was vastly superior to the single brigade that held Resaca that day, but that practically amounts to nothing. A single division would have been as good for such an assault as two corps. Beyond a reasonable proportion, say of three or four to one, numbers amount to nothing in making such an assault. It would be physically possible for numbers to succeed in such a case if their immediate commander was willing to sacrifice them and they were willing to be sacrificed. But considering the general unwillingness among commanders and men to sacrifice or to be sacrificed beyond what seems to them a reasonable expenditure of life for the object to be gained, success is morally impossible, or very nearly so, in an assault such as would have been required to capture Resaca on May 9, 1864. Clearly, such an assault should not be attempted except as the only chance of victory; and then the subordinate officers and men should be clearly informed precisely what they are expected to do, and made to understand the necessity for so great and unusual a sacrifice. In that case, brave and true men will make the sacrifice required, provided their pluck holds out long enough; and that no man is wise enough to predict, even of himself, much less of a large number of men.
McPHERSON'S TASK AT RESACA
The only chance of success was to invest Resaca on the west and north, and put between the investing line and Dalton troops enough to hold their ground against the main body of Johnston's army; and this must have been done in a single day, starting from the débouché of Snake Creek Gap, the troops moving by a single, common country road. Johnston's whole army, except a small rear-guard, would by the use of three roads have been in position to attack McPherson at dawn of day the next morning, while the main body of Sherman's army was far away on the other side of Rocky-face. Or if McPherson had not held the entire natural position as far east as the Connasauga River, Johnston could have passed round him in the night. It seems to me certain that McPherson's force was too small to have taken and held that position. Indeed it does not seem at all certain that, however large his force might have been, he could have put troops enough in position before night to accomplish the object of cutting of Johnston's retreat. The case was analogous to that of Hood's crossing Duck River in November of that year, and trying to cut off our retreat at Spring Hill. There was simply not time enough to do it in that one day, and if not done in one day it could not be done at all.
So that it does not seem at all certain that this, which was "Thomas's plan" to throw the entire Army of the Cumberland on the road in Johnston's rear and thus cut off his retreat, would have succeeded any better than Sherman's, yet it gave greater promise of success, and therefore ought to have been tried. It is at least probable that Johnston's view of the case (see his "Narrative," pages 15, 16, 17) is the correct one: That, with his thorough knowledge of the ground, ample roads, and means of early information, together with our ignorance of the ground and our extremely deficient roads, he could have defeated any possible attempt to cut him off from Resaca.
To illustrate the faulty system of organization and command which characterized the Atlanta campaign, I will now refer to an incident of the operations about Dallas, it being next in order of date of those I wish to consider. General Sherman does not allude to it at all in his "Memoirs."
Near the close of the operations about Dallas, the Twenty-third Corps was moved to our left, under instructions from General Sherman to endeavor to strike the enemy's right flank. A division of the Army of the Cumberland was ordered to "support" the Twenty-third Corps. There were no roads available, and the country was in the main densely wooded. The head of the column was directed by the compass toward a point where our maps, the general topography of the country, and the enemy's known position indicated that his right must probably rest. After a laborious march through dense undergrowth, during which our skirmish-line was lost in the woods and another deployed to replace it, we struck an intrenched line strongly held, and a sharp action ensued. The Twenty-third Corps was deployed as far to the left as possible, and the skirmishers reported that they had reached the extremity of the enemy's intrenched line, but could not overlap it. At this moment the division of the Army of the Cumberland came up in splendid style, and massed immediately in the rear of our left, in "close supporting distance," and under a pretty heavy fire. I first sent a staff officer and then went myself to the division commander, explained the situation, and asked him to put in a brigade on my left and turn the enemy's flank so as to give us a footing beyond his parapet. He replied that he was ordered by General Thomas only to "support" me, and that he would do no more. The day was already far advanced, and before I could bring troops from another part of my line darkness came on, and the action ended for the day. By the next morning I had brought another division of the Twenty-third Corps to the flank, and General Sherman arrived on the ground. By his personal orders this division was pushed straight through the woods to a point in the enemy's rear, on the road leading from Dallas to Acworth, which point it reached without any opposition, and there intrenched. That night Johnston abandoned his lines. An inspection of the enemy's intrenchments demonstrated that our skirmishers were right, and that a single brigade on our left would have been ample to turn the enemy's flank and open the way to victory. The above facts were immediately reported to Sherman and Thomas. I do now know what action, if any, was taken upon them.