Organized at Keokuk and mustered in June 8, 1861. Left State for Hannibal, Mo., June 29. Attached to Dept. of Missouri, to March, 1862. 1st Brigade, 4th Division, Army of the Tennessee, to July, 1862. 1st Brigade, 4th Division, District of Memphis, Tenn., Dept. of Tennessee, to September, 1862. 1st Brigade, 4th Division, District of Jackson, Dept. Tennessee, to November, 1862. 1st Brigade, 4th Division, Right Wing 13th Army Corps, Dept. Tennessee, to December, 1862. 1st Brigade, 4th Division, 17th Army Corps, Army Tennessee, to January, 1863. 1st Brigade, 4th Division, 16th Corps, to July, 1863. 1st Brigade, 4th Division, 13th Corps, to August, 1863. 1st Brigade, 4th Division, 17th Corps, to March, 1864. (1st Brigade, Provisional Division, 17th Corps, Dept. of the Gulf, to June, 1864. Non-Veterans.) 1st Brigade, 4th Division, 17th Corps, Army Tennesee, to November, 1864.
March into Missouri July 1-12, 1861. Skirmish at Utica July 3. Hagar's Woods July 8 (3 Cos.). Monroe Station July 9 and 11 (Cos. "A," "F," "H" and "K"). At Chillicothe, Mo., and guarding Hannibal & St. Joseph R. R. till August 7. Moved to Brookfield August 7 (7 Cos.), and against Green's forces at Kirksville August 15-21. (3 Cos. on Expedition to Paris, August.) Operations against guerrillas in North Central Missouri August 30-September 7. Action at Shelbina September 4. Expedition to Fonda against Green's forces September 8-9. Moved to Liberty September 12. Action at Blue Mills September 17.
Operations in North Missouri till October 18. At Quincy, Ill., November. Regiment reunite. Moved to Benton Barracks and duty there till December 26. Guard duty at Mexico and on Northern Missouri R. R. till march, 1862. Ordered to Pittsburg Landing, Tenn. Battle of Shiloh April 6-7. Advance on and siege of
Corinth, Miss., April 29-May 30. March to Memphis, Tenn., June 2-July 21, and duty there till September 6. Moved to Bolivar September 6. Skirmishes at Bolivar and Middleburg September 21. Duty at Bolivar till October 4. Battle of the Hatchie, Metamora, October 5. Grant's Central Mississippi Campaign November, 1862, to January, 1863. Worsham's Creek November 6. Guard Memphis & Charleston Railroad till March, 1863. Duty at Memphis till May. Expedition to the Coldwater April 18-24. Moved to Vicksburg, Miss., May 17-20. Attack on Steamer Crescent City, near Island 82, Mississippi River, May 18. Siege of Vicksburg, Miss., May 22-July 4. Advance on Jackson, Miss., July 5-10. Siege of Jackson July 10-17. Assault on Jackson July 12. Duty at Vicksburg till November. Moved to Natchez, Miss., November 18. Return to Vicksburg December 16, and duty there till February, 1864. Meridian Campaign February 3-March 2. Veterans on furlough March to May. Non-Veterans on Red River Campaign March 10-May 22. Fort DeRussy March 14. Pleasant Hill April 9.
Pleasant Hill Landing April 12-13. About Cloutiersville April 22-24. At Alexandria April 30-May 13. Boyce's and Wells' Plantation May 6. Bayou Boeuf May 7. Retreat to Morganza May 13-20. Mansura May 16. Yellow Bayou May 18-19. Non-Veterans mustered out June, 1864. Veterans moved to Cairo, lll., thence to Clifton, Tenn. March to Ackworth, Ga., via Huntsville and Decatur, Ala., and Rome, Ga., May 5-June 10. Atlanta (Ga.) Campaign June 10-September 8. Operations about Marietta and against Kenesaw Mountain June 10-July 2. Assault on Kenesaw June 27. Nickajack Creek July 2-5. Chattahoochie River July 6-12. Leggett's, Bald Hill, July 20-21. Battle of Atlanta July 22. Siege of Atlanta July 22-August 25. Flank movement on Jonesboro August 25-30. Battle of Jonesboro August 31-September 1. Lovejoy Station September 2-6. Pursuit of Hood into Alabama October 1-26. Shadow Church and Westbrooks, near Fairburn, October 1-3. Veterans consolidated to a Battalion of three Companies July, 1864. Transferred to 2nd Iowa Infantry as Companies "A," "F" and "I," November 4, 1864.
Regiment lost during service 8 Officers and 119 Enlisted men killed and mortally wounded and 122 Enlisted men by disease. Total 249.