The 3rd Tennessee Infantry was organized at Flat Lick, Kentucky from December 1861 through January 1862 and mustered in for a three-year enlistment.
1st Brigade, 2nd Division, Centre, XIV Corps, Army of the Cumberland, to January 1863.
District of Central Kentucky, Department of the Ohio, to June 1863.
3rd Brigade, 3rd Division, XXIII Corps, Army of the Ohio, to August 1863.
3rd Brigade, 3rd Division, Reserve Corps, Army of the Cumberland, to October 1863.
2nd Brigade, 2nd Division, XIV Corps, Army of the Cumberland, to November 1863.
Spear's Tennessee Brigade, 2nd Division, XXIII Corps, to January 1864.
3rd Brigade, Rousseau's 3rd Division, XII Corps, Army of the Cumberland, to April 1864.
1st Brigade, 2nd Division, XXIII Corps, Army of the Ohio, to February 1865.
Occupation of Cumberland Gap and covering rear at London June 18 – September 17.
(Battle of White's Farm, Richmond, Ky., August 30, Battalion).
Evacuation of Cumberland Gap and retreat to Greenupsburg, Ky., September 17 – October 3.
Near Gallipolis, Ohio, and operations in the Kanawha Valley until November.
Duty near Knoxville and operations in East Tennessee until April 1864.
Operations on line of Pumpkin Vine Creek and battles about Dallas, New Hope Church and Allatoona Hills May 26 – June 5.