Organized at Keokuk and mustered in October 4, 1862. Ordered to Memphis, Tenn., December, 1862; thence to Helena, Ark. Attached to 1st Brigade, 13th Division, 13th Army Corps, Dept. of Tennessee, to February, 1863. 2nd Brigade, 13th Division, 13th Army Corps, to July, 1863. 2nd Brigade, 13th Division, 16th Army Corps, to August, 1863. 1st Brigade, 13th Division, 16th Army Corps, to August, 1863. 1st Brigade, 3rd Division, Arkansas Expedition, to December, 1863. 1st Brigade, 3rd Division, 7th Army Corps, Dept. of Arkansas, to March, 1864. 2nd Brigade, 3rd Division, 7th Army Corps, to May, 1864. 2nd Brigade, 1st Division, 7th Army Corps, to February. 1865. 1st Brigade, 1st Division, 7th Army Corps, to March, 1865. 1st Brigade, 2nd Division, 7th Army Corps, to August, 1865.
Duty at Helena, Ark., till February 24, 1863. Yazoo Pass Expedition by Moon Lake, Yazoo Pass and Coldwater and Tallahatchie Rivers, and operations against Fort Pemberton and Greenwood February 24-April 5. Fort Pemberton April 4. Post duty at Helena till August 10. Repulse of Holmes' attack on
Helena July 4. (A detachment on expedition to Napoleonville May 23-26, and engaged near Island No. 65 May 25.) Steele's Expedition to Little Rock August 10-September 10. Bayou Fourche and capture of Little Rock September 10. Duty at Little Rock till October 26. Pursuit of Marmaduke's forces October 26-November 1. Duty at Pine Bluff and Little Rock till March 23, 1864. Steele's Expedition to Camden March 23-May 3. Elkin's Ford, Little Missouri River, April 4-6. Prairie D'Ann April
10-13. Jenkins Ferry and Camden April 15. Occupation of Camden April 15-23. Battle of Marks Mills April 25; most of Regiment captured. Confined at Camp Tyler, Texas, till March, 1865. Rejoined Regiment at St. Charles on White River, Ark., April, 1865. Action at Jenkins' Ferry, Saline River, April 30, 1864. Duty at Little Rock till March, 1865; at St. Charles till May, and at Duvall's Bluff till August, 1865. Mustered out August 24, 1865.
Regiment lost during service 1 Officer and 64 Enlisted men killed and mortally wounded and 6 Officers and 232 Enlisted men by disease. Total 303.