118th Illinois Volunteer Infantry Regiment The 118th Illinois Volunteer Infantry was an infantry regiment in the Union Army during the American Civil War . On June 10 , 1863 , the regiment was converted to mounted infantry . Service . The 118th Illinois Infantry was organized at Camp Bulter 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 . 1st Brigade , 9th Division , XIII Corps , Army of the Tennessee , to July 1863 . 3rd Brigade , 1st Division , XIII Corps , Army of the Tennessee , to August 1863 , and Department of the Gulf to September 1863 . 1st Brigade , Cavalry Division , Department of the Gulf , to November 1863 . 2nd Brigade , Cavalry Division , Department of the Gulf , to July 1864 . 1st Brigade , Cavalry Division , Department of the Gulf , to September 1864 . 2nd Brigade , Cavalry Division , Department of the Gulf , to February 1865 . Cavalry Brigade , District of Baton Rouge , Department of the Gulf , to July 1865 . Department of Texas to October 1865 . The 118th Illinois Infantry mustered out of service on October 1 , 1865 , returned to Camp Butler , October 2 – 10 , and was discharged October 13 , 1865 . Detailed service . Duty at Camp Butler and guarding prisoners until December . Left Illinois for Memphis , Tenn . , December 1 , 1862 . Sherman ' s Yazoo Expedition December 20 , 1862 to January 2 , 1863 . Chickasaw Bayou December 26 – 28 , 1862 . Chickasaw Bluffs December 29 . Yazoo River January 2 , 1863 . Expedition to Arkansas Post , Ark . , January 3 – 10 . Assault and capture of Fort Hindman January 10 – 11 . Moved to Young ' s Point , La . , January 17 – 23 , and duty there until March 9 . Moved to Milliken ' s Bend , La . , March 9 . Operations from Milliken ' s Bend to New Carthage March 31 - April 17 . Movement on Bruinsburg and turning Grand Gulf April 25 – 30 . Thompson ' s Hill , Port Gibson , May 1 . Champion Hill May 16 . Big Black River May 17 . Siege of Vicksburg , Miss . , May 18 - July 4 . Assaults on Vicksburg May 19 and 22 . At Black River Bridge May 24 - July 6 . Regiment mounted June 10 . Edwards ' Ferry July 1 ( detachment ) . Advance on Jackson , Miss . , July 6 – 10 . Near Clinton July 8 ( detachment ) . Near Jackson July 9 . Siege of Jackson July 10 – 17 . Raid to Brookhaven July 17 – 20 . Brookhaven July 18 . At Vicksburg July 25 - August 8 . Moved to Port Hudson August 8 – 9 , then to Carrollton , La . , August 15 – 16 , and to Bayou Boeuf September 5 – 7 . To Brashear City September 16 . Western Louisiana Campaign October 3 - November 30 . Regiment mounted October 11 , 1863 . Vermillionville October 15 . Carrion Crow Bayou October 16 – 20 . Grand Coteau October 19 . Reconnaissance toward Opelousas October 20 . Barrie ' s Landing , Opelousas , October 21 . Scouting and skirmishing about Opelousas October 22 – 30 . Washington October 24 . Bayou Bourbeaux November 2 . Carrion Crow Bayou November 3 . Bayou Sara November 9 . Near Vermillionville November 11 . At New Iberia November 15 - December 18 . Camp Pratt November 20 . Scout to Vermillion Bayou November 22 – 23 . Scout to St . Martinsville December 2 – 3 . Moved to Donaldsonville December 18 – 23 , then to Port Hudson January 3 – 7 , and duty there until July 3 , 1864 . On scout January 12 . Capture of Jackson , Miss . , February 10 . Skirmish February 16 . Raid to Bayou Sara and skirmish February 22 . Raid to Jackson March 3 . Skirmishes March 26 – 28 , April 1 and 5 , May 15 , June 13 and 17 . Bayou Grosse Tete March 30 and April 2 . Plains Store April 7 . Redwood Bayou May 3 . Moved to Baton Rouge July 3 . Operations about Baton Rouge July 3 – 25 . Expedition to Davidson ' s Ford , near Clinton , July 17 – 18 . Olive Branch August 5 . Lee ' s Expedition to Clinton August 23 – 29 . Comite River and Clinton August 25 . Hodge ' s Plantation September 11 . Expedition to Amite River , New River and Bayou Manchac October 2 – 8 . Expedition to Clinton , Greensburg , etc . , October 5 – 9 . Lee ' s Expedition to Brookhaven , Miss . , November 14 – 21 . Liberty November 18 . Davidson ' s Expedition to West Pascagoula against Mobile & Ohio Railroad November 27 - December 13 . Outpost duty at Baton Rouge until May 22 , 1865 . Expedition west of Mississippi River February 2 – 3 . Expedition to Olive Branch , La . , March 1 – 10 . Provost duty at Baton Rouge until October . Expedition to Clinton and Comite River March 30 - April 2 . Casualties . The regiment lost a total of 207 men during service ; 3 officers and 21 enlisted men killed or mortally wounded , 1 officer and 182 enlisted men died of disease .