The 112th Illinois Volunteer Infantry was an infantry regiment in the Union Army during the American Civil War. It was organized at Peoria in September 1862 and garrisoned places in Kentucky until Spring 1863. Beginning in April 1863, the regiment served as mounted infantry during the Knoxville campaign, before being dismounted in February 1864. Subsequently, it served in the Atlanta campaign, the Franklin-Nashville campaign, and the Carolinas campaign as part of the XXIII Corps. The regiment was mustered out on June 20, 1865.
Service
The 112th Illinois Infantry was organized at Peoria, Illinois, and mustered in for three years service on September 20, 1862 under the command of Colonel Thomas Jefferson Henderson.
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.
The 112th Illinois Infantry mustered out of service at Greensboro, North Carolina June 20, 1865, and was discharged at Chicago on July 7, 1865.