Organized at Keokuk and mustered in May 27, 1861. Left State for Northern Missouri June 13. Attached to Dept. of Missouri, to October, 1861. 3rd Brigade, District of Cairo, October, 1861. District of St. Louis, Mo., Dept. Missouri, to February, 1862. 4th Brigade, 2nd Division, District of Cairo, February, 1862. 1st Brigade, 2nd Division, Army of the Tennessee, to July, 1862. 1st Brigade, 2nd Division, District of Corinth, to September, 1862. 3rd Brigade, 2nd Division, District Corinth, to October, 1862. 2nd Brigade, 2nd Division, District Corinth, to November, 1862. 1st Brigade, 2nd Division, District of Corinth, 13th Army Corps (Old), Dept. Tennessee, to December, 1862. 1st Brigade, District of Corinth, 17th Army Corps, to January, 1863. 1st Brigade, District of Corlnth, 16th Army Corps, to March, 1863. 1st Brigade, 2nd Division, 16th Army Corps, to September, 1863. 1st Brigade, 4th Division, 15th Army Corps, to July, 1865.
Guarding railroad with headquarters at St. Joseph, Mo., till July 26, 1861. At Bird Point, Mo., till August 14. At Ironton, Pilot Knob, till August 27. At Jackson, Mo., till September 8. At Fort Jefferson, Ky., till September 23, and at Bird's Point till October 2. Expedition to Charleston October 2-12. At St. Louis, Mo., till February 10, 1862. Moved to Fort Donelson, Tenn., February 10-14. Investment and capture of Fort Donelson February 14-16. Duty at Fort Donelson till March 5. Moved to Pittsburg Landing, Tenn., March 5-17. Battle of Shiloh, Tenn., April 6-7. Advance on and siege of Corinth, Miss., April
29-May 30. Duty at Corinth till September. March to Iuka September 18-22. Battle of Corinth October 3-4. Pursuit to Ruckerville October 5-12. Duty at Corinth till April, 1863. Skirmish at Little Brier Creek November 28, 1862. Expedition to intercept Forest December 9-14. Little Briar Creek December 12. Dodge's Expedition to intercept Forest December 18, 1862, to January 3, 1863. Expedition to Hamburg January 26, 1863, and to Jacinto February 25-27. Dodge's Expedition into Northern Alabama April 15-May 2. Bear Creek April 16-17. Tuscumbia April 23-24. Town Creek April 27-28. Duty at Corinth till August, and at LaGrange till November 1. March to Pulaski, Tenn., November 1-11. Duty there and along Nashville & Decatur Railroad, and at Decatur till May, 1864. Atlanta (Ga.) Campaign May 1-September 8. Movements on Resaca May 5-13. Snake Creek Gap May 10-12. Battle Resaca May 14-15. Ley's Ferry, Oostenaula River, May 15. Rome Cross Roads May 16. Operations on line of Pumpkin Vine Creek and battles about Dallas,
New Hope Church and Allatoona Hills May 25-June 5. Operations about Marietta and against
Kenesaw Mountain June 10-July 2. Nickajack Creek July 4. Chattahoochie River July 6-17. Decatur July 19. Battle of
Atlanta July 22. Siege of Atlanta July 22-August 25. Skirmish on picket line August 4. Flank movement on Jonesboro August 25-30. Action Flint River Station August 30. Battle of Jonesboro August
31-September 1. Lovejoy Station September 2-6. Moved to Rome September 26, and duty there till November 10. Reconnoissance and skirmishes on Cave Springs Road October 12-13. March to the sea November 15-December 10. Little Ogeechee River December 4. Jenks' Station December 7. Siege of Savannah December 10-21. Campaign of the Carolinas January to April, 1865. Sister's Ferry, Savannah River, January 31-February 5. South Edisto River February 9. North Edisto River February 12-13. Congaree Creek February 15. Columbia February 16-17. Lynch's Creek February 26. Battle of Bentonville, N. C.,
March 20-21. Occupation of Goldsboro March 24. Advance on Raleigh April 10-13. Occupation of Raleigh April 14. Bennett's House April 26. Surrender of Johnston and his army. March to Washington, D. C., via Richmond, Va., April 29-May 20. Grand Review May 24. Moved to Louisville, Ky., June. Mustered out July 12 and discharged at Davenport, Iowa, July 20, 1865.
Regiment lost during service 12 Officers and 108 Enlisted men killed and mortally wounded and 4 Officers and 159 Enlisted men by disease. Total 283.