Organized at Dubuque and mustered in October 6, 1862. Moved to Davenport, Iowa, October 15-16; thence to St. Louis, Mo., November 21-23. Attached to District of Columbus, 13th Army Corps (Old), Dept. of Tennessee, to January, 1863. District of Columbus, 6th Division, 16th Army Corps, Dept. of Tennessee, to January, 1864. 2nd Brigade, 3rd Division, 16th Corps, to March, 1864. 2nd Brigade, 3rd Division, 16th Corps, Dept. of the Gulf, to June, 1864. 2nd Brigade, 3rd Division, 16th Corps, Dept. of Tennessee, to December, 1864. 2nd Brigade, 2nd Division (Detachment), Army of Tennessee, Dept. of the Cumberland, to February, 1865. 2nd Brigade, 2nd Division, 16th Corps, Military Division West Mississippi, to August, 1865.
Companies "B," "C," "E," "H", "I" and "K" moved from St. Louis, Mo., to New Madrid, Mo., November 25-28, 1862, and duty there till December 28. Expedition to Clarkston, Mo., December 17-21 (Cos. "C" and "I"). Evacuation of New Madrid December 28, and moved to Fort Pillow, Tenn., December 28-29. Duty there till June 20, 1863. (Co. "F" at Fulton April 1 to June.) Ordered to Columbus, Ky., June 20, and duty there till January 20, 1864. Expedition to Rickman, Ky., August 1, 1863 (Cos. "B" and "I"). (Co. "C" mounted July 1, 1863. and attached to 4th Missouri Cavalry till January 15, 1864, when rejoined Regiment.) Companies "H" and "I" ordered to Island No. 10 September 1, 1863. Action at Island No. 10 October 16 (Cos. "H" and "I"). Expedition to Tiptonville November 21 (Co. "H"). All Companies moved to Vicksburg, Miss., January 20-26, 1864. Meridian Campaign February 3-March 2. Meridian February 16. Near Canton February 27-28. Canton February 28. (Cos. "A," "D," "F" and "G" detached from Regiment and moved to Cape Girardeau, Mo., November 25-28, 1862. Attached to District of Southeast Missouri to July, 1863. Reserve Brigade, 1st Cavalry Division, Army of Southeast Missouri, to August, 1863. Reserve Brigade, 1st Cavalry Division, Arkansas Expedition, to December, 1863. 1st Brigade, 1st Cavalry Division, Dept. of Arkansas, to January, 1864.
Garrison duty at Cape Girardeau, Mo., till March 14, 1863. Moved to Bloomfield March 14 and return to Cape Girardeau April 21. Action at Cape Girardeau April 28. Pursuit of Marmaduke to Castor April 28-May 5. At Cape Girardeau till July. Moved to Bloomington July 10, thence march to Clarendon, Ark., July 19-August 8. Steele's Expedition to Little Rock August 8-September 10. Expedition up White and Little Red Rivers August 13-16. West Point, White River, August 14. Harrison's Landing August 16. Reed's Bridge, Bayou Metoe, August 27. Shallow Ford, Bayou Metoe, August 30. Bayou Fourche and capture of Little Rock September 10. Duty at Little Rock till January, 1864. Expedition to Mt. Ida November 10-18, 1863. Moved to Memphis, Tenn., January 31-February 5, 1864; thence to Vicksburg, Miss., February 7-9, and duty there till March, when rejoined Regiment. (Red River Campaign March 10-May 22, 1864. Fort DeRussy March 14. Battle of Pleasant Hill April 9. Cane River Crossing April 22-24. At Alexandria April 26-May 13. Alexandria May 2-9. Retreat to Morganza April 13-20. Mansura May 15-16. Mellow Bayou May 18. Moved to Vicksburg, Miss., thence to Memphis, Tenn., May 20-June 10. Lake Chicot, Ark., June 6-7. Smith's Expedition to Tupelo, Miss., July 5-21. Harrisburg July 13. Tupelo July 14-15. Old
Town Creek July 15. Smith's Expedition to Oxford, Miss., August 1-30. Tallahatchie River August 7-9. Abbeville August 23. Moved to St. Louis, Mo., September 16; thence to Desota, Mo., September 25. March through Missouri in pursuit of Price September 25-November 19. Moved to Nashville, Tenn., November 21-December 1. Battles of Nashville, Tenn.,
December 15-16. Pursuit of Hood December 17-28. At Eastport, Miss., till February, 1865. Expedition from Eastport to Iuka January 9, 1865. Moved to New Orleans, La., February 9-22; thence to Dauphin Island, Ala. Campaign against Mobile and its Defences March 8-April 12. Siege of Spanish Fort and Fort Blakely March 26-April 18. Assault and capture of Fort Blakely April 9. Occupation of Mobile April 12. March to Montgomery April 13-25, and duty there and in District of Alabama till August. Mustered out August 24, 1865.
Regiment lost during service 6 Officers and 101 Enlisted men killed and mortally wounded and 2 Officers and 213 Enlisted men by disease. Total 322.