▁the ▁three - month ▁ 6 th ▁Ohio ▁Infantry . ▁When ▁his ▁term ▁of ▁en list ment ▁exp ired , ▁he ▁was ▁promoted ▁to ▁second ▁lieutenant ▁in ▁the ▁ 5 2 nd ▁Ohio ▁Infantry . ▁ ▁He ▁later ▁served ▁as ▁post ▁adj ut ant ▁of ▁Camp ▁Ch ase ▁in ▁Columb us , ▁Ohio , ▁after ▁the ▁prisoners ▁of ▁war ▁captured ▁at ▁Fort ▁Don el son ▁were ▁transport ed ▁there ▁following ▁U ly ss es ▁S . ▁Grant ' s ▁victory ▁in ▁February ▁ 1 8 6 2 . ▁ ▁In ▁April ▁ 1 8 6 2 , ▁C ist ▁joined ▁the ▁ 7 4 th ▁Ohio ▁Infantry ▁as ▁a ▁first ▁lieutenant ▁and ▁became ▁its ▁regiment al ▁adj ut ant , ▁serving ▁under ▁Colonel ▁Gran ville ▁Mo ody . ▁He ▁later ▁served ▁as ▁the ▁assistant ▁adj ut ant ▁general ▁with ▁the ▁rank ▁of ▁captain ▁on ▁the ▁staff ▁of ▁Major ▁General ▁William ▁S . ▁Rose cr ans ▁in ▁the ▁Army ▁of ▁the ▁C umber land . ▁ ▁Later ▁he ▁was ▁on ▁the ▁staff ▁of ▁Major ▁General ▁George ▁H . ▁Thomas . ▁ ▁At ▁Maj . ▁Gen . ▁Thomas ' s ▁request , ▁he ▁remained ▁in ▁the ▁service ▁after ▁the ▁close ▁of ▁host ilities ▁to ▁give ▁the ▁necessary ▁orders ▁and ▁to ▁ar range ▁the ▁details ▁providing ▁for ▁the ▁must ering ▁out ▁and ▁dis band ing ▁of ▁over ▁ 1 0 0 , 0 0 0 ▁troops . ▁ ▁In ▁the ▁om n ibus ▁prom ot ions ▁issued ▁by ▁the ▁War ▁Department ▁following ▁the ▁end ▁of ▁the