My own staff also was somewhat reorganized and increased at Mill Creek, and though it had been perfectly satisfactory before, yet, on account of the changes of troops that had occurred in the command, I found it necessary to replace valuable officers in some instances, and secure additional ones in others. The gathering of information about the enemy was also industriously pursued, and Card and his brothers were used constantly on expeditions within the Confederate lines, frequently visiting Murfreesboro', Sparta, Tullahoma, Shelbyville, and other points. What they learned was reported to army headquarters, often orally through me or personally communicated by Card himself, but much was forwarded in official letters, beginning with November 24, when I transmitted accurate information of the concentration of Bragg's main force at Tullahoma. Indeed, Card kept me so well posted as to every movement of the enemy, not only with reference to the troops in my immediate front, but also throughout his whole army, that General Rosecrans placed the most unreserved reliance on all his statements, and many times used them to check and correct the reports brought in by his own scouts.
Slight skirmishes took place frequently during this period, and now and then heavy demonstrations were made in the neighborhood of Nolensville by reconnoitring parties from both armies, but none of these ever grew into a battle. These affairs sprung from the desire of each side to feel his antagonist, and had little result beyond emphasizing the fact that behind each line of pickets lay a massed and powerful army busily preparing for the inevitable conflict and eager for its opening. So it wore on till the evening of December 25, 1862; then came the order to move forward.
General Rosecrans, in the reorganization of the army, had assigned Major-General A. McD. McCook to command the right wing, Major-General George H. Thomas the centre, and Major-General T. L. Crittenden the left wing. McCook's wing was made up of three divisions, commanded in order of rank by Brigadier-General Jeff. C. Davis; Brigadier-General R. W. Johnson, and Brigadier-General P. H. Sheridan. Although the corps nomenclature established by General Buell was dropped, the grand divisions into which he had organized the army at Louisville were maintained, and, in fact, the conditions established then remained practically unaltered, with the exception of the interchange of some brigades, the transfer of a few general officers from one wing or division to another, and the substitution of General Thomas for Gilbert as a corps commander. The army was thus compact and cohesive, undisturbed by discord and unembarrassed by jealousies of any moment; and it may be said that under a commander who, we believed, had the energy and skill necessary to direct us to success, a national confidence in our invincibility made us all keen for a test of strength with the Confederates. We had not long to wait.
Early on the morning of December 26, 1862, in a heavy rain, the army marched, the movement being directed on Murfreesboro', where the enemy had made some preparation to go into winter-quarters, and to hold which town it was hoped he would accept battle. General Thomas moved by the Franklin and Wilson pikes, General Crittenden by the Murfreesboro' pike, through Lavergne, and General McCook by the Nolensville pike—Davis's division in advance. As McCook's command neared Nolensville, I received a message from Davis informing me that the Confederates were in considerable force, posted on a range of hills in his front, and requesting me to support him in an attack he was about to make. When the head of my column arrived at Nolensville I began massing my troops on the right of the road, and by the time this formation was nearly completed Davis advanced, but not meeting with sufficient resistance to demand active assistance from me, he with his own command carried the hills, capturing one piece of artillery. This position of the Confederates was a strong one, defending Knob's Gap, through which the Nolensville and Triune pike passed. On the 27th Johnson's division, followed by mine, advanced to Triune, and engaged in a severe skirmish near that place, but my troops were not called into action, the stand made by the enemy being only for the purpose of gaining time to draw in his outlying troops, which done, he retired toward Murfreesboro'. I remained inactive at Triune during the 28th, but early on the 29th moved out by the Bole Jack road to the support of, Davis in his advance to Stewart's Creek, and encamped at Wilkinson's crossroads, from which point to Murfreesboro', distant about six miles, there was a good turnpike. The enemy had sullenly resisted the progress of Crittenden and McCook throughout the preceding three days, and as it was thought probable that he might offer battle at Stewart's Creek, Thomas, in pursuance of his original instructions looking to just such a contingency, had now fallen into the centre by way of the Nolensville crossroads.
On the morning of the 30th I had the advance of McCook's corps on the Wilkinson pike, Roberts's brigade leading. At first only slight skirmishing took place, but when we came within about three miles of Murfreesboro' the resistance of the enemy's pickets grew serious, and a little further on so strong that I had to put in two regiments to push them back. I succeeded in driving them about half a mile, when I was directed by McCook to form line of battle and place my artillery in position so that I could act in concert with Davis's division, which he wished to post on my right in the general line he desired to take up. In obedience to these directions I deployed on the right of, and oblique to the Wilkinson pike, with a front of four regiments, a second line of four regiments within short supporting distance, and a reserve of one brigade in column of regiments to the rear of my centre. All this time the enemy kept up a heavy artillery and musketry fire on my skirmishers, he occupying, with his sharpshooters, beyond some open fields, a heavy belt of timber to my front and right, where it was intended the left of Davis should finally rest. To gain this point Davis was ordered to swing his division into it in conjunction with a wheeling movement of my right brigade, until our continuous line should face nearly due east. This would give us possession of the timber referred to, and not only rid us of the annoying fire from the skirmishers screened by it, but also place us close in to what was now developing as Bragg's line of battle. The movement was begun about half-past 2, and was successfully executed, after a stubborn resistance. In this preliminary affair the enemy had put in one battery of artillery, which was silenced in a little while, however, by Bush's and Hescock's guns. By sundown I had taken up my prescribed position, facing almost east, my left (Roberts's brigade) resting on the Wilkinson pike, the right (Sill's brigade) in the timber we had just gained, and the reserve brigade (Schaefer's) to the rear of my centre, on some rising ground in the edge of a strip of woods behind Houghtaling's and Hescock's batteries. Davis's division was placed in position on my right, his troops thrown somewhat to the rear, so that his line formed nearly a right angle with mine, while Johnson's division formed in a very exposed position on the right of Davis, prolonging the general line just across the Franklin pike.
The centre, under Thomas, had already formed to my left, the right of Negley's division joining my left in a cedar thicket near the Wilkinson pike, while Crittenden's corps was posted on the left of Thomas, his left resting on Stone River, at a point about two miles and a half from Murfreesboro'.
The precision that had characterized every manoeuvre of the past three days, and the exactness with which each corps and division fell into its allotted place on the evening of the 30th, indicated that at the outset of the campaign a well-digested plan of operations had been prepared for us; and although the scheme of the expected battle was not known to subordinates of my grade,