Organized at Keokuk and mustered in September 20, 1862. Moved to St. Louis, Mo., October 25, 1862; thence to Helena, Ark. Attached to District of Eastern Arkansas, Dept. of Missouri, to December, 1862. 2nd Brigade, 1st Division, District of Eastern Arkansas, Dept of Tennessee, December, 1862. 3rd Brigade, 11th Division, Right Wing 13th Army Corps (Old), Dept. of Tennessee, to December, 1862. 3rd Brigade, 4th Division, Sherman's Yazoo Expedition, to January, 1863. 3rd Brigade, 1st Division, 15th Army Corps, Dept. of Tennessee, to September, 1863. 2nd Brigade, 1st Division, 15th Corps, to December, 1863. 1st Brigade, 1st Division, 15th Corps, to September, 1864. 3rd Brigade, 1st Division, 15th Corps, to July, 1865.
Expedition from Helena, Ark., to Arkansas Post November 16-21, 1862. Hovey's Expedition to Grenada, Miss., November 27-December 5. Mitchell's Cross Roads December 1. Sherman's Yazoo Expedition December 22, 1862, to January 2, 1863. Chickasaw Bayou December 26-28, 1862. Chickasaw Bluffs December 29. Expedition to Arkansas Post, Ark., January 3-10, 1863. Assault on and capture of Fort Hindman, Arkansas Post, January 10-11. Moved to Young's Point, La., January 17-23, and duty there till April. Expedition to Greenville, Black Bayou and Deer Creek April 2-14. Demonstration on Haines and Snyder's Bluff April 28-May 2. Moved to join army in rear of Vicksburg, Miss., via Richmond and Grand Gulf May 2-14. Jackson, Miss., May 14. Siege of Vicksburg May 18-July 4. Assaults on Vicksburg May 19 and 22. Advance on Jackson July 5-10. Siege of Jackson July 10-17. Brandon Station July 17-19. Duty at Big Black till September 22. Moved to Memphis, thence march to Chattanooga, Tenn., September 22-November 21. Operations on Memphis & Charleston Railroad in Alabama October 20-29. Cherokee Station October 21 and 29. Cane Creek October 26. Tuscumbia October 26-27. Battles of Chattanooga November 23-27; Lookout Mountain November 23-24; Mission Ridge November 25; Ringgold Gap, Taylor's Ridge, November 27. March to relief of Knoxville November 28-December 8. Garrison duty in Alabama till April, 1864. Atlanta Campaign May 1 to September 8. Demonstration on Resaca May 8-13. Snake Creek Gap May 10-12. Battle of Resaca May 14-15. 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. Bushy Mountain June 15-17. Assault on Kenesaw June 27. Nickajack Creek July 2-5. Chattahoochie River July 6-17. Battle of Atlanta July 22. Siege of Atlanta July 22-August 25.
Ezra Chapel, Hood's second sortie, July 28. 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. March to the sea November 15-December 10.
Griswoldsville November 23. Siege of Savannah December 10-21. Campaign of the Carolinas January to April, 1865. Reconnoissance to Salkehatchie River, S. C., January 25. Salkehatchie Swamps,
S. C., February 3-5. South Edisto River February 9. North Edisto River February 12-13. Columbia February 15-17. Lynch's Creek February 25-26. Battle of Bentonville, N. C., March 20-21. Occupation of Goldsboro March 24. Advance on Raleigh April 9-18. Occupation of Raleigh April 14. Bennett's House April 26. Surrender of Johnston and his army. March to Washington, D. C., via Richmond April 29-May 20. Grand Review May 24. Mustered out June 5, 1865.
Regiment lost during service 8 Officers and 65 Enlisted men killed and mortally wounded and 3 Officers and 241 Enlisted men by disease. Total 317.