 The 118th Illinois Infantry was organized at Camp Butler in Springfield, Illinois, August through October 1862 and mustered in for three years service on November 7, 1862, under the command of Colonel John G. Fonda.The regiment was attached to 1st Brigade, 9th Division, Right Wing, XIII Corps, Department of the Tennessee, December 1862.1st Brigade, 3rd Division, Sherman's Yazoo Expedition, to January 1863.