Organized at Oskaloosa and mustered in October 4, 1862. Left State for St. Louis, Mo., November 20. Attached to Dept. of Missouri to January, 1862. 1st Brigade, 13th Division, 13th Army Corps, Dept. of Tennessee, to February, 1863. 2nd Brigade, 13th Division, 13th Corps, to July, 1863. 2nd Brigade, 13th Division, 16th Corps, to August, 1863. 2nd Brigade, 3rd Division, Army of Arkansas, to January, 1864. 2nd Brigade, 3rd Division, 7th Corps, Dept. of Arkansas, to March, 1864. 1st Brigade, 3rd Division, 7th Corps, to May, 1864. 1st Brigade, 1st Division, 7th Corps, to February, 1865. 3rd Brigade, 3rd Division, Reserve Corps, Military Division West Mississippi, to February, 1865. 3rd Brigade, 3rd Division, 13th Corps, to July, 1865.
Duty at St. Louis, Mo., till December 21, 1862. Moved to Columbus, Ky., December 21-24; thence to Union City, Tenn., January 1-3, 1863, and to Helena, Ark., January 8. Duty there till August. Yazoo Pass Expedition by Moon Lake, Yazoo Pass and Tallahatchie and Coldwater Rivers and operations against Ft. Pemberton and Greenwood February 14-April 8. Yazoo Pass April 16.
Expedition from Helena May 6-13. Repulse of Holmes' attack on
Helena July 4. Steele's Expedition to Little Rock August 11-September 10. Bayou Fourche and capture of Little Rock September 10. Duty at Little Rock till March, 1864. Expedition to Benton October 25-26, 1863. Steele's Expedition to Camden March 23-May 3, 1864. Antoine or Terre Noir Creek April 2.
Elkins' Ferry, Little Missouri River, April 3-4. Prairie D'Ann April 9-12. Jenkins Ferry and Camden April 15. Occupation of Camden April 15-23. Moro Bottom April 25-26. Jenkins Ferry, Saline River, April 30. At Little Rock till February, 1865. Expedition to Fort Smith October 30-December 8, 1864. Expedition to Mt. Elba January 22-February 4, 1865. Moved to New Orleans, La., February 14-18. Campaign against Mobile and its Defences March 17-April 12. Siege of Spanish Fort and Fort Blakely March 26-April 8. Assault on and capture of Fort Blakely April 9. Occupation of Mobile April 12. Whistler's Station April 13. At McIntosh's Bluff April 19 to June 1. Moved to Mobile, thence to Brazos Santiago, Texas, June 1-7, and duty there till July 4. Ordered to New Orleans July 4. Mustered out July 17, 1865, and discharged at Rock Island, Ill., August 7, 1865.
Regiment lost during service 3 Officers and 65 Enlisted men killed and mortally wounded and 1 Officer and 215 Enlisted men by disease. Total 284.