enden ' s ▁support , ▁and ▁while ▁the ▁Confeder ates ▁were ▁crossing ▁the ▁cre ek , ▁Thomas ▁began ▁to ▁arrive ▁in ▁C ritt enden ' s ▁rear ▁area . ▁ ▁Battle ▁ ▁First ▁day : ▁September ▁ 1 9 ▁ ▁Rose cr ans ' s ▁movement ▁of ▁Maj . ▁Gen . ▁George ▁H . ▁Thomas ' s ▁XIV ▁Corps ▁the ▁previous ▁day ▁put ▁the ▁left ▁fl ank ▁of ▁the ▁Army ▁of ▁the ▁C umber land ▁farther ▁north ▁than ▁B rag g ▁expected ▁to ▁find ▁when ▁he ▁form ulated ▁his ▁plans ▁for ▁an ▁attack ▁on ▁September ▁ 2 0 . ▁Maj . ▁Gen . ▁Thomas ▁L . ▁C ritt enden ' s ▁XX I ▁Corps ▁was ▁concentr ated ▁around ▁Lee ▁and ▁Gordon ' s ▁Mill , ▁which ▁B rag g ▁assumed ▁was ▁the ▁left ▁fl ank , ▁but ▁Thomas ▁was ▁array ed ▁behind ▁him , ▁covering ▁a ▁wide ▁front ▁from ▁C raw fish ▁Spr ings ▁( div ision ▁of ▁Maj . ▁Gen . ▁James ▁S . ▁Neg ley ), ▁the ▁W id ow ▁Gl enn ' s ▁house ▁( M aj . ▁Gen . ▁Joseph ▁J . ▁Reyn olds ), ▁Kelly ▁field ▁( B rig . ▁Gen . ▁Abs alom ▁B air d ), ▁to ▁around ▁the ▁Mc Donald ▁farm ▁( B rig . ▁Gen . ▁John ▁M . ▁Bran nan ). ▁Maj . ▁Gen . ▁Gordon ▁Gr anger ' s ▁Reserve ▁Corps ▁was ▁spread ▁along ▁the ▁northern ▁end ▁of ▁the ▁battle field ▁from ▁Ross ville ▁to ▁Mc A fe e ' s ▁Church