The 4th Kentucky Infantry Regiment was organized at Camp Dick Robinson and mustered in for a three-year enlistment on October 9, 1861, under the command of Colonel Speed Smith Fry.
The regiment was attached to Thomas' Command, Army of the Ohio, to November 1861.
2nd Brigade, 1st Division, III Corps, Army of the Ohio, to November 1862.
2nd Brigade, 3rd Division, Center, XIV Corps, Army of the Cumberland, to January 1863.
1st Brigade, 1st Division, Cavalry Corps, Army of the Cumberland, to November 1864.
The 4th Kentucky Infantry mustered out of service at Macon, Georgia, on August 17, 1865.
Action at Logan's Cross Roads on Fishing Creek January 19.
Moved to Louisville, Kentucky, then to Nashville, Tennessee, February 11-March 2.
Buell's Campaign in northern Alabama and middle Tennessee June to August.
March to Nashville, Tennessee, then to Louisville, Kentucky, in pursuit of Bragg August 20-September 26.
Moved to Nashville, Tennessee, January 13, 1863, and duty there until June.
Passage of Cumberland Mountains and Tennessee River and Chickamauga Campaign August 16-September 22.
Regiment changed to mounted infantry and reorganized at Lexington, Kentucky.
At Villenow Valley and Snake Creek Gap, Georgia, guarding railroad until July.
Moved to Nashville, Tennessee, then to Franklin and pursuit of Forrest September 25-October 10.