Organized at Aurora, Ill., and mustered in September 23, 1861. Moved to St. Louis, Mo., thence to Rolla, Mo.. September 24-29, 1861. Attached to Dept. of Missouri to January, 1862. 2nd Brigade, Army of Southwest Missouri, to March, 1862. 2nd Brigade, 1st Division, Army of Southwest Missouri, to June, 1862. 1st Brigade, 5th Division, Army Mississippi, to September, 1862. 37th Brigade, 11th Division, Army of the Ohio, to October, 1862. 37th Brigade, 11th Division, 3rd Corps, Army Ohio, to November, 1862. 1st Brigade, 3rd Division, Right Wing, 14th Army Corps, Army of the Cumberland, to January, 1863. 1st Brigade, 3rd Division, 20th Army Corps, Army of the Cumberland, to October, 1863. 1st Brigade, 2nd Division, 4th Army Corps, to August, 1865. Dept. of Texas, to September, 1865.
SERVICE - Duty at Rolla, Mo., till January 14, 1862. Expedition against Freeman's forces November 1-9, 1861. Curtis' Campaign against Price in Missouri and Arkansas January to March, 1862. Advance on Springfield February 2-13. Pursuit of Price into Arkansas February 14-29. Battles of Pea Ridge, Ark., March 6-8. At Keitsville, Mo., till April 5. March to Batesville, Ark., April 5-May 3. Moved to Cape Girardeau, Mo., May 11-22, thence to Hamburg Landing, Tenn., May 23-29. Occupation of Corinth, Miss., May 30. Pursuit to Booneville May 31-June 6. Duty at Rienzi till September 6. Moved to Covington, Ky., thence to Louisville, Ky., September 6-19. Pursuit of Bragg into Kentucky October 1-16. Battle of Perryville, October 8. March to Nashville, Tenn., October 16-November 7. Duty there till December 26. Reconnoissance toward Clarksville November 15-20. Reconnoissance to Mill Creek November 27. Advance on Murfreesboro, Tenn., December 26-30. Battle of Stone's River December 30-31, 1862, and January 1-3, 1863. At and near Murfreesboro till June. Expedition toward Columbia March 4-14. Middle Tennessee or Tullahoma Campaign June 24-July 7. Occupation of Middle Tennessee till August 15. Passage of 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 till January, 1864. Regiment Veteranize January 1, 1864, and Veterans on furlough till March. Atlanta (Ga.) Campaign May 1 to September 8. 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. 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. 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. Buckhead, Nancy's Creek, July 18. 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. Pursuit of Hood, into Alabama October 1-26. Nashville Campaign November-December. Columbia, Duck River, November 24-27. Spring Hill November 29. Battle of Franklin November 30. Battle of Nashville December 15-16. Pursuit of Hood to the Tennessee River December 17-28. At Huntsville, Ala., till March, 1865. Operations in East Tennessee March 15-April 22. Moved to Nashville and duty there till June. Moved to New Orleans, La., June 15-23. Duty at Headquarters of General P. H. Sheridan, Commanding Dept. of the Gulf, to October.
Mustered out October 8 and discharged at Springfield, Ill, October 27, 1865.
Regiment lost during service 11 Officers and 193 Enlisted men killed and mortally wounded and 1 Officer and 127 Enlisted men by disease. Total 332.