|112th Regiment Illinois Volunteer Infantry|
|Active||September 20, 1862 - July 7, 1865|
|Engagements||Siege of Knoxville|
Battle of Resaca
Battle of Dallas
Battle of New Hope Church
Battle of Allatoona
Battle of Kennesaw Mountain
Siege of Atlanta
Battle of Utoy Creek
Battle of Jonesborough
Battle of Lovejoy's Station
Battle of Franklin
Battle of Nashville
The regiment was attached to 1st Brigade, 2nd Division, Army of Kentucky, Department of the Ohio, to January 1863. 3rd Brigade, District of Central Kentucky, Department of the Ohio, to April 1862. 2nd Brigade, District of Central Kentucky, Department of the Ohio, to June 1863. 1st Brigade, 1st Division, XXIII Corps, Army of the Ohio, to August 1863. 1st Brigade, 4th Division, XXIII Corps, to October 1868. 2nd Brigade, 4th Division, XXIII Corps, to November 1863. 2nd Brigade, 1st Cavalry Division, XXIII Corps, to May 1864. 1st Brigade, 3rd Division, XXIII Corps, to August 1865. 3rd Brigade, 3rd Division, XXIII Corps, Army of the Ohio, to February 1865, and Department of North Carolina to June 1865.
Moved to Covington, Kentucky, October 8, 1862. Moved to Falmouth, Kentucky, October 18, 1862. Escorted supply train to Big Eagle, Kentucky, October 19–21, then moved to Georgetown and Lexington, Kentucky. October 23–24. Duty at Lexington until March 1863. Moved to Danville, Kentucky, March 21; then to Nicholasville, Camp Dick Robinson, Lancaster, Crab Orchard, Stanford, and Milledgeville, Kentucky. Duty at Milledgeville until April 26. Regiment mounted at Milledgeville. Moved to Somerset April 26. Operations against Pegram's forces in southeastern Kentucky April 26-May 12. Action at Monticello May 1. Duty at Somerset, Kentucky, until July. Saunders' Raid in eastern Tennessee June 14–24 (detachment). Knoxville June 19–20. Strawberry Plains June 20. Rogers' Gap June 20. Powder Springs Gap June 21. Pursuit of Scott's forces July 9–13. Operations in eastern Kentucky against Scott July 26-August 6. Battle of Richmond July 28. Burnside's Campaign in eastern Tennessee August 16-October 16. Winker's Gap August 31. Action at Cleveland September 18. Athens, Calhoun, and Charleston September 25. Calhoun September 26. Athens September 27. About Kingston October 16–24. Philadelphia October 25–26. Lieper's Ferry, Holston River, October 28. Knoxville Campaign November 4-December 23. Holston River November 15. Campbell's Station November 16. Near Knoxville November 16. Siege of Knoxville November 17-December 5. Skirmishes about Bean's Station December 9–13. Bean's Station December 10 and 14. Blain's Cross Roads December 16–19. Bend of Chucky Road, near Dandridge, January 16, 1864. Operations about Dandridge January 16–17. Dandridge January 17. Operations about Dandridge January 26–28. Flat and Muddy Creek January 26. Near Fair Garden January 27. Kelly's Ford January 27–28. Moved to Marysville, then to Knoxville and dismounted, then moved to Mount Sterling, Ky., February 1864. Duty at Mt. Sterling February 22-April 6. Moved to Camp Nelson, Kentucky, April 6, then to Knoxville, Tennessee, arriving May 3. Movement to Tunnel Hill, Georgia, May 3–5. Atlanta Campaign May 5-September 8. Demonstrations on Dalton May 9–13. Battle of Resaca May 14–15. Cartersville May 18. Advance on Dallas May 18–25. 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 Kennesaw Mountain June 10-July 2. Lost Mountain June 15–17. Muddy Creek June 17. Noyes' Creek June 19. Cheyney's Farm June 22. Olley's Creek June 26–27. Assault on Kennesaw June 27. Line of Nickajack Creek July 2–5. Chattahoochie River July 5–17. Siege of Atlanta July 22-August 25. Utoy Creek August 5–7. Flank movement on Jonesboro August 25–30. Battle of Jonesboro August 31-September 1. Lovejoy's Station September 2–6. Operations against Hood and Forrest in northern Georgia and northern Alabama September 29-November 3. Nashville Campaign November–December. Columbia, Duck River, November 24–27. Battle of Franklin November 30. Battle of Nashville December 15–16. Pursuit of Hood to the Tennessee River December 17–29. At Clifton, Tennessee, until January 15, 1865. Movement to Washington, D.C., then to Fort Fisher, North Carolina, January 18-February 9. Operations against Hoke February 11–14. Fort Anderson February 18. Capture of Fort Anderson February 19. Town Creek February 19–20. Capture of Wilmington February 22. Carolinas Campaign March 1-April 26. Advance on Goldsbow March 6–21. Occupation of Goldsboro March 21. Gurley's March 31. Advance on Raleigh April 10–14. Occupation of Raleigh April 14. Bennett's House April 26. Surrender of Johnston and his army. Duty at Greensboro, North Carolina, until June 20.
The regiment lost a total of 234 men during service; 4 officers and 76 enlisted men killed or mortally wounded, 1 officer and 153 enlisted men died of disease.
- Colonel Thomas J. Henderson - promoted to brevet brigadier general November 30, 1864
- Lieutenant Colonel Emery S. Bond - commanded the regiment at rank until muster out
- Catalogue of the Officers and Members of the Henry County Regiment, Being the 112th Regiment Illinois Volunteers (Geneseo, IL: Union Advocate Book and Job Printing Establishment), 1862.
- Dunkle, George McKinney. Diary of George McKinney Dunkle: August 25, 1862, to November 29, 1864, 112th Regiment Illinois Volunteers, Company D (Evansville, IN: M.T. Pub.), 1997.
- Dyer, Frederick H. A Compendium of the War of the Rebellion (Des Moines, IA: Dyer Pub. Co.), 1908.
- Thompson, Bradford F. History of the 112th Regiment of Illinois Volunteer Infantry, in the Great War of the Rebellion, 1862-1865 (Toulon, IL: Printed at the Stark County News Office), 1885.
- Vincent, Sheridan Eugene. Dr. Michael Vincent, born 1784, Columbia County, New York, and His Descendants: Including the Civil War Letters of his Grandson, Corporal Martin Luther Vincent, 112th Illinois Infantry (Rochester, NY: Vincent Family Records Publications), 1996. ISBN 0-9623-2759-X