The 102nd Illinois Infantry was organized at
Knoxville,
Illinois, and mustered in for three years service on September 1, 1862. The regiment was attached to Ward's Brigade, Dumont's 12th Division,
Army of the Ohio, to November 1862. Ward's Brigade, Post of Gallatin, Tennessee,
Department of the Cumberland, to June 1863. 2nd Brigade, 3rd Division, Reserve Corps,
Army of the Cumberland, to August 1863. Ward's Brigade, Post of Nashville, Tennessee, Department of the Cumberland, to January 1864. 1st Brigade, 1st Division,
XI Corps, Army of the Cumberland, to April, 1864. 1st Brigade, 3rd Division,
XX Corps, Army of the Cumberland, and
Army of Georgia, to June, 1865. The 102nd Illinois Infantry mustered out of service on June 6, 1865, and discharged at
Chicago, Illinois, on June 14, 1865. ==Detailed service==