Organized at Dubuque and mustered in December 4, 1862. Moved to St. Louis, Mo., December 15; thence to Columbus, Ky., December 28-30. Attached to District of Columbus, Ky., 16th Army Corps, Dept. of Tennessee, to June, 1863. 1st Brigade, Herron's Division, 13th Army Corps, Army of Tennessee, to July, 1863. 1st Brigade, 2nd Division, 13th Army Corps, Army of Tennessee, to August, 1863, and Dept. of the Gulf to June, 1864. United States Forces, Texas, to August, 1864. United States Forces, Mobile Bay, to October, 1864. District of LaFourche, Dept. of the Gulf, to December, 1864. 3rd Brigade, Reserve Corps, Military Division West Mississippi, to December, 1864.
Expedition to Union City, Tenn., December 31, 1862-January 1, 1863. Moved to New Madrid, Mo., January 1, 1863, and duty there till June. Moved to Vicksburg, Miss., June 6-15. Siege of Vicksburg June 15-July 4. Expedition to Yazoo City July 12-21. Occupation of Yazoo City July 14. Moved to Port Hudson, La., July 24-27; thence to Carrollton, La., August 15. Expedition to the Rio Grande, Texas, October 23-November 4. Advance on Brownsville November 6. Duty at Brownsville till July 31, 1864. Moved to New Orleans, La., July 31-August 5; thence to Mobile Bay August 7-9. Siege of Fort Morgan August 9-23. Capture of Fort Morgan August 23. Moved to New Orleans, La., September 8-11. Duty at Donaldsonville till December. Consolidated with 34th Iowa Infantry December 12, 1864.
Regiment lost during service 2 Enlisted men killed and mortally wounded and 4 Officers and 311 Enlisted men by disease. Total 317.