The 1st Battalion of the 15th Infantry: Companies A, B, C, D, E, F, G and H; commanded by Major John H. King.
The 1st Battalion of the 16th Infantry: Companies A, B, C, D, E, F, G and H, 1st Battalion, and Company B, 2d Battalion; Major A. J. Slemmer commanding.
The 1st Battalion of the 18th Infantry: Companies A, B, C, D, E, F, G and H, of the 1st, and A and D, of the 3d Battalion; Major J. N. Caldwell in command.
The 2d Battalion of the 18th Infantry: Companies A, B, C, D, E and F, of the 2d, and B, C, E and F, of the 3d Battalion; commanded by Major Frederick Townsend.
The 1st Battalion of the 19th Infantry: Companies A, B, C, D, E and F; Major S. D. Carpenter commanding.
Battery H, 5th U. S. Artillery, commanded by 1st Lieutenant F. L. Guenther.
Lieutenant-Colonel O. L. Shepherd, 18th U. S. Infantry, the senior officer, was placed in command of the brigade.
When the Army of the Ohio—then become the Army of the Cumberland, or the 14th Corps—advanced from Nashville, Tenn., toward its objective point, the enemy, the Regular Brigade broke camp on the 26th, encamping on the evening of that day on the Petersburg Turnpike; on the 27th it encamped near Nolansville, Tenn.; on the 28th, at night, it marched across the country to Stewart’s Creek, and on the 30th to a point on the Murfreesboro’ and Nashville Turnpike about four miles from Murfreesboro’, Tenn.
On the morning of the 31st of December the brigade left its bivouac at an early hour and advanced on the Nashville Turnpike to a point a little less than three miles northwest of Murfreesboro’, and, with its division, was posted in reserve. The division consisted of Scribner’s, John Beatty’s, Starkweather’s and the Regular Brigade, and was commanded by Major-General Lovell H. Rousseau. Starkweather’s Brigade had been left at Jefferson’s Crossing on Stone River. The division was part of the centre, commanded by Major-General George H. Thomas. The formation in the brigade was from right to left as follows: 15th, 16th, 18th, 1st and 2d Battalions, and the 19th.