Organized at Rockford, Ill., and mustered in September 4, 1862. Moved to Jackson, Tenn., November 4-12, 1862. Attached to 1st Brigade, 6th Division, Left Wing 13th Army Corps (Old), Dept. of the Tennessee, to December, 1862. 1st Brigade, 6th Division, 16th Army Corps, to January, 1863. 1st Brigade, 6th Division, 17th Army Corps, to May, 1863. 2nd Brigade, 6th Division, 17th Army Corps, to September, 1863. 2nd Brigade, 1st Division, 17th Army Corps, to March, 1864. 2nd Brigade, Provisional Division, 17th Army Corps, Dept. of the Gulf, to June, 1864 (Non Veterans). 2nd Brigade, Sturgis' Expedition, June, 1864 (Non Veterans). Detached Brigade, 17th Army Corps, June, 1864 (Non Veterans). 4th Brigade, 1st Division, 16th Army Corps, to December, 1864 (Non Veterans). 3rd Brigade, 3rd Division, 17th Army Corps, April to December, 1864 (Veterans). 2nd Brigade, 3rd Division, Detachment, Army of the Tennessee, Dept. of the Cumberland, to February, 1865. 3rd Brigade, 3rd Division, 16th Army Corps (New), Military Division West Mississippi, to August, 1865.
SERVICE - Grant's Central Mississippi Campaign November, 1862, to January, 1863. At Memphis January 13-20, 1863. Moved to Lake Providence, La., January 20-26, and duty there till April. Skirmish at Old River, Lake Providence, February 10. Moved to Milliken's Bend, La., April 12. Movement on Bruinsburg and turning Grand Gulf April 25-30. Battles of Fort Gibson, Miss., May 1; Raymond May 12; Jackson May 14; Champion's Hill May 16; Big Black River May 17. Siege of Vicksburg May 18 - July 4. Assaults on Vicksburg May 19-22 and June 25, Expedition to Mechanicsburg May 26 - June 4. Surrender of Vicksburg July 4. Moved to Natchez, Miss., July 12-13, and duty there till October 17. Moved to Vicksburg October 17 and duty there till February, 1864. Meridian Campaign February 3-25. Veterans on furlough March - April. Red River Campaign March 10 - May 22. Fort DeRussy March 14. Battle of Pleasant Hill, Pleasant Hill Landing, April 12-13. About Cloutiersville April 22-24. Natchitochez April 22. At Alexandria April 26 - May 13. Boyce's Plantation and Wells' Plantation May 6. Twelve Mile Bayou and Bayou Boeuf May 7. Retreat to Morganza May 13-20. Mansura May 16. Yellow Bayou May 18. Moved to Vicksburg, Miss., May 21-24, thence to Memphis, Tenn., May 28-30. Sturgis' Expedition to Guntown June 1-13. Brice's or Tishamingo Creek near Guntown June 10. Ripley June 11. Moved to St. Charles, Ark., August 3-6, thence to Duvall's Bluff September 1, and to Brownsville September 8. March through Arkansas and Missouri in pursuit of Price September 17 - November 21. Moved to Nashville, Tenn., November 23-30. Battle of Nashville December 15-16. Pursuit of Hood to the Tennessee River December 17-28. Moved to Eastport, Miss., and duty there till February 6, 1865. (Veterans Joined 3rd Brigade, 3rd Division, 17th Army Corps, at Cairo, Ill., thence moved to Clifton, Tenn., and march to Ackworth, Ga., via Huntsville and Decatur, Ala., and Rome, Ga., April 28 - June 8, 1864. Atlanta (Ga.) Campaign June 8 to September 8. Operations about Marietta and against Kenesaw Mountain June 10 - July 2. Assault on Kenesaw Mountain June 27. Nickajack Creek July 2-5. Howell's Ferry July 5. On line of the Chattahoochie River July 6-17. Leggett's Bald Hill July 20-21. Battle of Atlanta July 22. 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 Georgia and North Alabama September 29 - November 3. Rejoined Regiment at Nashville, Tenn.) Moved to New Orleans, La., February 6-21, 1865, and duty there till March 12. Campaign against Mobile and its defenses March 21 - April 12. Siege of Spanish Fort and Fort Blakely March 26 - April 8. Assault and capture of Fort Blakely April 9. Occupation of Mobile April 12. March to Montgomery, Ala., April 13-25, and duty there till July. Moved to Meridian and Vicksburg, Miss.
Mustered out August 17, 1865. Recruits transferred to 47th Illinois Infantry.
Regiment lost during service 7 Officers and 77 Enlisted men killed and mortally wounded and 1 Officer and 204 Enlisted men by disease. Total 289.