Organized by direction of the President May 4, 1861, and confirmed by Act of Congress July 29, 1861. Regiment organized at Columbus, Ohio. Ordered to Louisville, Ky., December 2, 1861. Attached to 3rd Brigade, 1st Division, Army of the Ohio, to September, 1862. 3rd Brigade, 1st Division, 3rd Corps, Army of the Ohio, to November, 1862. 3rd Brigade, 3rd Division (Centre), 14th Army Corps, Army of the Cumberland, to December, 1862. 4th Brigade, 1st Division (Centre), 14th Army Corps, to January, 1863. 4th Brigade, 1st Division, 14th Army Corps, to April, 1863. 3rd Brigade, 1st Division, 14th Army Corps, to October, 1863. 2nd Brigade, 1st Division, 14th Army Corps, to October, 1864. Regular Brigade, Chattanooga, Tenn., Dept. of the Cumberland, to November, 1864. 1st Brigade, 1st Separate Division, District of the Etowah, Dept. of the Cumberland, to July, 1865.
-Operations in Southeast Kentucky December, 1861, to February, 1862. Advance to Camp Hamilton, Ky., January 1-17, 1862. Logan's Cross Roads, Mill Springs, January 19-20. Moved to Louisville, Ky., thence to Nashville, Tenn., February 10-March 2. March to Savannah, Tenn., March 20-April 6. Battle of Shiloh, Tenn., April 6-7. Advance on and siege of Corinth, Miss., April 29-May 30. Buell's Campaign in North Alabama and Middle Tennessee June to August. March to Louisville, Ky., in pursuit of Bragg August 21-September 26. Pursuit of Bragg into Kentucky October 1-22. Near Bardstown October 6. Battle of Perryville October 8. March to Nashville, Tenn., October 22-November 7, and duty there till December 26. Advance on Murfreesboro December 26-30. Battle of Stone's River December 30-31, 1862, and January 1-3, 1863. Duty near Murfreesboro till June. Eaglesville March 2 (Detachment). Middle Tennessee (or Tullahoma) Campaign June 23-July 7. Hoover's Gap June 24-26. Beech Grove June 26. Occupation of Middle Tennessee till August 16. Passage of the Cumberland Mountains and Tennessee River and Chickamauga (Ga.) Campaign August 16-September 22. Battle of Chickamauga, Ga., September 19-21. Rossville Gap September 21. Siege of Chattanooga, Tenn., September 24-November 23. Reopening Tennessee River October 26-29. Battles of Chattanooga November 23-27. Orchard Knob November 23-24. Mission Ridge November 25. Graysville November 26. Pea Vine Creek November 27. Reconnoissance of Dalton, Ga., February 22-27, 1864. Tunnel Hill, Buzzard's Roost Gap and Rocky Faced Ridge February 23-25. Atlanta (Ga.) Campaign May 1-September 8. Rocky Faced Ridge May 8-11. Battle of Resaca May 14-15. Advance on Dallas May 18-25. Operations on line of Pumpkin Vine Creek and battles about Dallas, New Hope Church and Allatoona Hills May 25-June 5. Pickett's Mills May 27. Operations about Marietta and against Kenesaw Mountain June 10-July 2. Pine Hill June 11-14. Lost Mountain June 15-17, Assault on Kenesaw Mountain June 27. Ruff's Station, Smyrna Camp Ground, July 4. Chattahoochie River July 5-17. Peach Tree Creek July 19-20. Siege of Atlanta July 22-August 25. Utoy Creek August 5-7. Flank movement on Jonesboro August 25-30. Battle of Jonesboro August 31-September 1. At Atlanta till September 28. Moved to Chattanooga, Tenn., September 28-30, thence to Lookout Mountain and duty there till July, 1865.
Regiment lost during service 9 Officers and 209 Enlisted men killed and mortally wounded and 6 Officers and 246 Enlisted men by disease. Total 470.