Organized at Camp Butler, Springfield, Ill., and mustered in October 25, 1862. Moved to Memphis, Tenn., November 11-17, 1862. Attached to Reserve Brigade, District of Memphis, 13th Army Corps (Old), Dept. of the Tennessee, to December, 1862. District of Memphis, 16th Army Corps, to March, 1863. 2nd Brigade, 10th Division, 13th Army Corps, Army of the Tennessee, to July. 1863. 2nd Brigade, 4th Division, 13th Army Corps. Dept. of the Tennessee, to August, 1863, and Dept. of the Gulf to June, 1864. 3rd Brigade, 3rd Division, 19th Army Corps, Dept. of the Gulf, to October, 1864. Defenses of New Orleans, La., to January, 1865. Consolidated with 77th Illinois Infantry January 25, 1865. Regiment revived June 23, 1865. 1st Brigade, 3rd Division, 13th Army Corps (New), Military Division West Mississippi, to August, 1865.
SERVICE - Duty at Fort Pickering, Memphis, Tenn., till March 27. 1863. Moved to Milliken's Bend, La., March 27-31, and duty there till April 25. Movement on Bruinsburg and turning Grand Gulf April 25-30. Battle of Magnolia Hills, Port Gibson, May 1. Champion's Hill May 16. Big Black River Bridge May 17. Siege of Vicksburg, Miss.. May 18 - July 4. Assaults on Vicksburg May 19 and 22. Advance on Jackson, Miss., July 5-10. Siege of Jackson July 10-17. Reconnaissance to Pearl River July 11. Camp at Big Black till August 13. Ordered to New Orleans, La., August 13, and duty there till October. Western Louisiana Campaign October 3 - November 30. At New Iberia till December 6. Moved to New Orleans, thence to Pass Cavallo, Texas, December 6-20, and duty there till February, 1864. Reconnaissance on Matagorda Peninsula January 21. Moved to Algiers, thence to Franklin, La. Red River Campaign March 10 - May 22. Advance from Franklin to Alexandria, La.. March 14-26. Bayou De Paul, Carroll's Mills, April 8. Battle of Sabine Cross Roads April 8. Regiment mostly captured at Sabine Cross Roads and confined at Tyler, Texas, 13 months. Retreat to Morganza May 13-20, Garrison duty at New Orleans, La., June, 1864, to January, 1865. With 77th Illinois Infantry in Campaign against Mobile and its defenses February to April. Siege of Spanish Fort and Fort Blakely March 26 - April 9. Assault and capture of Fort Blakely April 9. Occupation of Mobile April 12. Expedition to Tombigbee River and McIntosh Bluffs April 13 - May 9. At Mobile till July. Regiment reorganized at Mobile July 11, 1865.
Ordered to New Orleans and mustered out August 15, 1865.
Regiment lost during service 2 Officers and 18 Enlisted men killed and mortally wounded and 4 Officers and 153 Enlisted men by disease. Total 177.