▁B rag g ' s ▁right ▁and ▁left ▁fl anks , ▁respectively . ▁ ▁O pp osing ▁forces ▁ ▁Union ▁ ▁The ▁Union ▁Army ▁of ▁the ▁C umber land , ▁commanded ▁by ▁Rose cr ans , ▁consisted ▁of ▁about ▁ 6 0 , 0 0 0 ▁men , ▁composed ▁of ▁the ▁following ▁major ▁organizations : ▁ ▁XIV ▁Corps , ▁commanded ▁by ▁Maj . ▁Gen . ▁George ▁H . ▁Thomas , ▁ 2 2 , 7 8 1 ▁present ▁for ▁duty ▁with ▁division ▁command ers ▁Brig . ▁Gen . ▁Abs alom ▁B air d , ▁Maj . ▁Gen . ▁James ▁S . ▁Neg ley , ▁Brig . ▁Gen . ▁John ▁M . ▁Bran nan , ▁and ▁Maj . ▁Gen . ▁Joseph ▁J . ▁Reyn olds . ▁ ▁XX ▁Corps , ▁commanded ▁by ▁Maj . ▁Gen . ▁Alexander ▁Mc D . ▁McC ook , ▁ 1 3 , 1 5 6 ▁present ▁with ▁division ▁command ers ▁Brig . ▁Gen . ▁Jefferson ▁C . ▁Davis , ▁Brig . ▁Gen . ▁Richard ▁W . ▁Johnson , ▁and ▁Maj . ▁Gen . ▁Philip ▁Sher idan . ▁ ▁XX I ▁Corps , ▁commanded ▁by ▁Maj . ▁Gen . ▁Thomas ▁L . ▁C ritt enden , ▁ 1 4 , 6 6 0 ▁present ▁with ▁division ▁command ers ▁Brig . ▁Gen . ▁Thomas ▁J . ▁Wood , ▁Maj . ▁Gen . ▁John ▁M . ▁Pal mer , ▁and ▁Brig . ▁Gen . ▁Hor atio ▁P . ▁Van ▁Cle ve . ▁ ▁Reserve ▁Corps , ▁commanded ▁by ▁Maj . ▁Gen .