Organized at Davenport August and September, 1861. Left State for St. Louis, Mo., September 25. Attached to Dept. of Missouri to March, 1862. 3rd Brigade, 2nd Division, Army of Tennessee, to April, 1862. 1st Brigade, 2nd Division, Army of Tennessee, to July, 1862, and District of Corinth, Dept. of the Tennessee, to November, 1862. 1st Brigade, District of Corinth, 13th Army Corps (Old), Dept. of the Tennessee, to December, 1862. Davenport, Ia., to January, 1863. District of St. Louis, Mo., Dept. of the Missouri, to April, 1863. 3rd Brigade, 3rd Division, 15th Army Corps, Army of Tennessee, to December, 1863. 3rd Brigade, 1st Division, 16th Army Corps, to June, 1864. Unassigned, District of Memphis, Tenn., District of West Tennessee, to February, 1865. 3rd Brigade, 3rd Division, 16th Army Corps, Military Division West Mississippi, to August, 1865. Dept. of Alabama to April, 1866.
Moved to Syracuse, Mo., October 15, 1861. Fremont's Campaign against Springfield, Mo., October 21-November 8. Duty at Sedalia, Mo., till March, 1862. Expedition to Milford, Mo., December 15-19, 1861. Action at Shawnee Mound, Milford on the Blackwater, December 18. (Cos. "E" and "K" detached to guard train to Fort Leavenworth, Kansas, November 21, 1861, and duty on Border till March, 1862. Rejoin Regiment at Sedalia.) Moved from Sedalia to St. Louis; thence to Pittsburg Landing, Tenn., March 11-21. Battle of Shiloh, Tenn., April 6-7. Most of Regiment captured. Men confined at Macon, Ga.; Officers at Selma, Ala., and Madison, Ga. Paroled October 18, 1862. Exchanged November 10, 1862. Those not captured attached to Union Brigade and participated in advance on and siege of Corinth, Miss., April
29-May 30. Duty at Corinth till August. Moved to Danville, Miss., August 15, and duty there till October. Battle of Corinth October 3-4. Pursuit to Ripley October 5-12. Duty at Corinth till December 18. Ordered to rejoin Regiment at Davenport, Iowa, December 18. While en route participated in the defence of
Jackson, Tenn., December 20, 1862, to January 4, 1863. Arrived at Davenport January 7, 1863. Regiment reorganizing at Davenport, Iowa, and St. Louis, Mo., and duty at Rolla, Mo., till April, 1863. Ordered to Young's Point, La., April 9. Duty there and at Duckport till May 2. Moved to join army in rear of Vicksburg, Miss., May 2-14. Mississippi Springs May 13. Jackson, Miss., May 14. Siege of Vicksburg May 18-July 4.
Assaults on Vicksburg May 19 and 22. Expedition to Mechanicsburg May 26-June 4. Advance on Jackson, Miss., July 5-10. Siege of Jackson July 10-17. At Bear Creek till October. Expedition toward Canton, Miss., October 14-20. Bogue Chitto Creek October 17. Moved to Memphis, thence to Pocohontas, Tenn. Duty there and guarding Memphis & Charleston railroad till January 31, 1864. Moved to Vicksburg, Miss., February 1-6. Expedition to Canton February 25-March 4. Red River Campaign March 10-May 22. Fort DeRussy March 14. Henderson's Hill March 21. Campti March 26 and April 4. Grand Ecore April 5. Battle of Pleasant Hill April 9. Retreat to Natchitoches April 22-23. Cane River Crossing April 23. Cloutiersville April 23-24. At Alexandria, La., April 27-May 13. Bayou La Mourie May 6-7. Retreat to Morganza May 13-20. Mansura May 16. Yellow Bayou May 18-19. Moved to Vicksburg, Miss.; thence to Memphis, Tenn., May 20-June 10. Lake Chicot, Ark., June 5-6. Provost duty at Memphis till February, 1865. Repulse of Forest's attack on Memphis August 21. Moved to New Orleans, La., February, 1865. Campaign against Mobile and its Defences March 7-April 13. Siege of Spanish Fort and Fort Blakely March 26-April 8. Fort Blakely April 9.
Capture of Mobile April 12. March to Montgomery, Ala., April 13-22. Provost duty there till August and at Tuscaloosa and Selma till April, 1866. Mustered out April 20, 1866.
Regiment lost during service 4 Officers and 98 Enlisted men killed and mortally wounded and 4 Officers and 170 Enlisted men by disease. Total 276.