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.