Organized at Camp Dennison, Ohio, September to December, 1861, and mustered in February 17, 1862. Ordered to Paducah, Ky., and duty there till March 6. Attached to District of Paducah, Ky., to March, 1862. 4th Brigade, 5th Division, Army of the Tennessee, to May, 1862. 3rd Brigade, 5th Division, Army of the Tennessee, to July, 1862. 3rd Brigade, 5th Division, District of Memphis, Tenn., to November, 1862. 3rd Brigade, 5th Division, Right Wing 13th Army Corps (Old), Dept. of the Tennessee, to November, 1862. 2nd Brigade, 1st Division, Right Wing 13th Army Corps, to December, 1862. 2nd Brigade, 1st Division, Sherman's Yazoo Expedition, to January, 1863. 2nd Brigade, 10th Division, 13th Army Corps, Army of the Tennessee, to August, 1863. 2nd Brigade, 4th Division, 13th Army Corps, Dept. of the Tennessee and Dept. of the Gulf, to April, 1864. Captured at Sabine Cross Roads, La., April 8, 1864. Attached to Defences of New Orleans, La., Dept. of the Gulf, November, 1864, to January, 1865. Moved from Paducah, Ky., to Savannah, Tenn., March 6-10, 1862. Expedition from Savannah to Yellow Creek, Miss., and occupation of Pittsburg Landing, Tenn., March 14-17. Battle of Shiloh, Tenn., April 6-7. Advance on and siege of Corinth, Miss., April 29-May 30. March to Memphis, Tenn., via LaGrange, Grand Junction and Holly Springs June 1-July 21. Near Holly Springs July 1. Duty at Memphis and along Memphis & Charleston Railroad till November. Grant's Central Mississippi Campaign. Operations on the Mississippi Central Railroad. "Tallahatchie March" November 26-December 12. Sherman's Yazoo Expedition December 20, 1862, to January 2, 1863. Chickasaw Bayou December 26-28, 1862. Chickasaw Bluff December 29. Expedition to Arkansas Post, Ark., January 3-10, 1863. Assault and capture of Fort Hindman, Arkansas Post, Ark., January 10-11. Moved to Young's Point, La., January 15, and duty there till March 8. At Milliken's Bend, La., till April 25. Movement on Bruinsburg and turning Grand Gulf April 25-30. Battle of Port Gibson May 1. Battle of Champion's Hill May 16. Siege of Vicksburg, Miss., May 18-July 4. Assaults on Vicksburg May 19 and 22. Advance on Jackson, Miss., July 4-10. Siege of Jackson July 10-17. Camp at Big Black till August 13. Ordered to New Orleans, La., August 13. Western Louisiana ("Teche") Campaign October 3-November 30. At New Iberia till December 13. Moved to New Orleans, La., December 13; thence to Pass Cavallo, Texas, and duty there and at Du Crow's Point till March 1, 1864. Moved to New Orleans, La., March 1. Red River Campaign March 10 to April 23. Advance from Franklin to Alexandria March 14-26. Bayou De Paul, Carroll's Mill, April 8. Battle of Sabine Cross Roads April 8. Regiment captured and prisoners of war till October, 1864, when exchanged. Duty at New Orleans till January, 1865. Consolidated with 83rd Ohio Infantry January 17, 1865. Moved to Kennersville January 28, thence to Barrancas, Fla. March from Pensacola, Fla., to Fort Blakely, Ala., March 20-April 2. Siege of Fort Blakely April 2-9. Assault and capture of Fort Blakely April 9. Occupation of Mobile April 12. March to Montgomery and Selma April 13-21. Duty at Selma till May 12. Moved to Mobile May 12, thence to Galveston, Texas, June 13, and duty there till July 24.