120th Ohio Infantry The 120th Ohio Volunteer Infantry ( or 120th OVI ) was an infantry regiment in the Union Army during the American Civil War . It was commanded by Colonel Daniel French and Colonel Marcus Spiegel . Service . The 120th Ohio Infantry was organized Mansfield , Ohio and mustered in August 29 , 1862 for three years service under the command of Colonel Daniel French . The regiment first served unattached , Army of Kentucky , Department of the Ohio , to November 1862 . 1st Brigade , 9th Division , Right Wing , XIII Corps , Department of the Tennessee , to 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 , Department of the Tennessee , to August 1863 , and Department of the Gulf to November 1863 . Plaquemine , Louisiana , District of Baton Rouge , Louisiana , Department of the Gulf , to March 1864 . 2nd Brigade , 1st Division , XIII Corps , to June 1864 . 2nd Brigade , 3rd Division , XIX Corps , Department of the Gulf , to August 1864 . 2nd Brigade , 2nd Division , XIX Corps , to November 1864 . The 120th Ohio Infantry ceased to exist on November 25 , 1864 due to consolidation with the 114th Ohio Infantry . Detailed service . Moved to Cincinnati , Ohio , October 25 ; then to Covington , Ky . , and duty there until November 24 . Moved to Memphis , Tenn . , November 24 - December 7 , 1862 . Sherman ' s Yazoo Expedition December 20 , 1862 to January 3 , 1863 . Chickasaw Bayou December 26 – 28 , 1862 . Chickasaw Bluff December 29 . Expedition to Arkansas Post , Ark . , January 3 – 10 , 1863 . Assault and capture of Fort Hindman , Arkansas Post , January 10 – 11 . Moved to Young ' s Point , La . , January 17 , and duty there until March 8 . Moved to Milliken ' s Bend March 8 . Operations from Milliken ' s Bend to New Carthage March 31 - April 17 . James ' Plantation , near New Carthage , April 8 . Dunbar ' s Plantation , Bayou Vidal , April 15 . Movement on Bruinsburg and turning Grand Gulf April 25 – 30 . Battle of Port Gibson May 1 . Duty at Raymond until May 18 . Siege of Vicksburg , Miss . , May 18 - July 4 . Assaults on Vicksburg May 19 and 22 . Advance on Jackson , Miss . , July 4 – 10 . Near Jackson July 9 . Siege of Jackson , Miss . , July 10 – 17 . Camp at Vicksburg until August . Moved to New Orleans August 18 . Duty at Carrollton until September 3 , and at Brashear City until October 3 . Western Louisiana Campaign October 3 - November 30 . Duty at Plaquemine , La . , until March 23 , 1864 . Moved to Baton Rouge March 23 , and duty there until May 1 . Ordered to join Banks at Alexandria on Red River Expedition May 1 . Embarked on steamer " City Belle " . Action en route at Snaggy Point May 3 . Over 200 men captured . Those who escaped were formed into a battalion of three companies and marched to Alexandria . Retreat from Alexandria to Morganza May 13 – 20 . Mansura or Marksville Prairie May 16 . Duty at Morganza until September . Expedition to mouth of White River and St . Charles September 13 – 20 . Expedition to Duvall ' s Bluff , Ark . , October 21 – 27 . Casualties . The regiment lost a total of 300 men during service ; 2 officers and 17 enlisted men killed or mortally wounded , 6 officer and 275 enlisted men died of disease .