Organized at Chicago, Ill., and mustered in August 27, 1862. Moved to Louisville, Ky., September 4, 1862. Attached to Army of Kentucky September, 1862. 6th Brigade, 2nd Division, 1st Army Corps, Army of the Ohio, to November, 1862. 1st Brigade, 2nd Division, Right Wing, 14th Army Corps, Army of the Cumberland, to January, 1863. 1st Brigade, 2nd Division, 20th Army Corps, Army of the Cumberland, to October, 1863. 1st Brigade, 3rd Division, 4th Army Corps, to June, 1865.
SERVICE - Pursuit of Bragg into Kentucky October 1-15, 1862. Skirmish at Lawrenceburg, Ky., October 7. Battle of Perryville, Ky., October 8. March to Bowling Green, Ky., and Nashville, Tenn., October 16 - November 7. Duty at Nashville, Tenn., till December 26. Advance on Murfreesboro December 26-30. Nolensville, Knob Gap December 26. Battle of Stone's River December 30-31, 1862, and January 1-3, 1863. Duty at Murfreesboro till June. Reconnaissance from Murfreesboro March 6-7. Middle Tennessee (or Tullahoma) Campaign June 22 - July 7. Liberty Gap June 22-27. 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 19-20. Siege of Chattanooga September 24 - November 23. Chattanooga - Ringgold Campaign November 23-27. Orchard Knob November 23-24. Mission Ridge November 25. Pursuit to Graysville November 26-27. March to relief of Knoxville November 28 - December 8. Operations in East Tennessee December, 1863, to April, 1864. Atlanta (Ga.) Campaign May to September. Demonstration on Rocky Faced Ridge May 8-11. Buzzard's Roost Gap May 8-9. Demonstration on Dalton May 9-13. Battle of Resaca May 14-15. Adairsville May 17. Near Kingston May 18-19. Near Cassville May 19. Advance on Dallas May 22-25. 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 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. Flank movement on Jonesboro August 25-30. Battle of Jonesboro August 31 - September 1. Lovejoy Station September 2-6. Operations against Hood in North Alabama and North Georgia September 29 - November 3. Nashville (Tenn.) Campaign November - December. Columbia, Duck River, November 24-27. Battle of Franklin November 30. Battle of Nashville December 15-16. Pursuit of Hood to the Tennessee River December 17-28. Moved to Huntsville, Ala., and duty there till March, 1865. Operations in East Tennessee March 15 - April 22. Moved to Nashville and duty there till June.
Mustered out June 10 and discharged at Camp Douglas, Chicago, Ill., June 24, 1865.
Regiment lost during service 12 Officers and 121 Enlisted men killed and mortally wounded and 1 Officer and 172 Enlisted men by disease. Total 306.