Organized at Keokuk and mustered in August 25, 1862. Ordered to St. Louis, Mo. Attached to District of Southwest Missouri, Dept. of Missouri, to October, 1862. 2nd Brigade, 3rd Division, Army of the Frontier, Dept. of Missouri, to June, 1863. 2nd Brigade, Herron's Division, 13th Army Corps, Army of Tennessee, to July, 1863. 2nd Brigade, 2nd Division, 13th Army Corps, Dept. of the Tennessee, to August, 1863, and Dept. of the Gulf to June, 1864. 2nd Brigade, United States Forces, Texas, Dept. of the Gulf, to August, 1864. District of West Florida, Dept. of the Gulf, to December, 1864. District of Southern Alabama, Dept. of the Gulf, to February, 1865. 1st Brigade, 2nd Division, Reserve Corps, Military Division West Mississippi, February, 1865. 1st Brigade, 2nd Division, 13th Army Corps, Military Division West Mississippi, to July, 1865.
Moved to Rolla, Mo., September 11, 1862; thence to Springfield, Mo., September 16, and to Cassville October 11. Blunt's Campaign October 17-December 27. Battle of Prairie Grove, Ark., December 7. Expedition over Boston Mountains to Van Buren December 27-28. Capture of Van Buren December 28. Duty at Forsythe February 15 to April 22, 1863. March to Hartsville and Salem April 22-May 2, and to Rolla June 2. Moved to Vicksburg, Miss., June 6-14. Siege of Vicksburg June 14-July 4. Expedition from Vicksburg to Yazoo City July 12-21. Capture of Yazoo City July 14. Moved to Port Hudson July 23 and to Carrollton, La., August 12-13. Expedition to Morganza September 5-12. Atchafalaya River September 9-10. Battle of Sterling's Plantation September 29. At Morganza till October 10, then moved to Carrollton. Expedition to Brazos, Santiago, Texas, October 27-December 2. Advance to Brownsville November 2-6 and duty there till July 24, 1864. Moved to New Orleans, La., July 24-August 7. Ordered to Pensacola, Fla., August 14, and duty at Barrancas, Fla., till December. Action at Milton, Fla., October 18. Expedition to Blackwater Bay October 25-28. Milton October 26. Moved to Fort Gaines, Dauphin Island, Ala., December 6, and duty there till March 17, 1865. Campaign against Mobile and its Defences March 17-April 12. Siege of Spanish Fort and Fort Blakely March 26-April 9. Fatigue duty dismantling Rebel Defences till May 4. Duty at Mobile till July 10. Mustered out July 10, 1865.
Regiment lost during service 6 Officers and 86 Enlisted men killed and mortally wounded and 2 Officers and 98 Enlisted men by disease. Total 192.