cr ans ▁was ▁attempting ▁to ▁move ▁the ▁center ▁of ▁the ▁battle ▁farther ▁north ▁than ▁B rag g ▁planned , ▁B rag g ▁began ▁r ushing ▁heavy ▁rein for c ements ▁from ▁all ▁parts ▁of ▁his ▁line ▁to ▁his ▁right , ▁starting ▁with ▁Che ath am ' s ▁division ▁of ▁Pol k ' s ▁Corps , ▁with ▁five ▁brig ades ▁the ▁largest ▁in ▁the ▁Army ▁of ▁Tennessee . ▁At ▁ 1 1 ▁a . m ., ▁Che ath am ' s ▁men ▁approached ▁L idd ell ' s ▁halt ed ▁division ▁and ▁formed ▁on ▁its ▁left . ▁Three ▁brig ades ▁under ▁Brig . ▁G ens . ▁Marcus ▁Wright , ▁Pr eston ▁Smith , ▁and ▁John ▁Jackson ▁formed ▁the ▁front ▁line ▁and ▁Brig . ▁G ens . ▁O th o ▁Stra hl ▁and ▁George ▁Man ey ▁commanded ▁the ▁brig ades ▁in ▁the ▁second ▁line . ▁Their ▁advance ▁greatly ▁over la pped ▁Cro xt on ' s ▁brig ade ▁and ▁had ▁no ▁difficulty ▁pushing ▁it ▁back . ▁As ▁Cro xt on ▁with d rew , ▁his ▁brig ade ▁was ▁replaced ▁by ▁Brig . ▁Gen . ▁Richard ▁Johnson ' s ▁division ▁of ▁McC ook ' s ▁XX ▁Corps ▁near ▁the ▁La F ay ette ▁Road . ▁Johnson ' s ▁lead ▁brig ades , ▁under ▁Col . ▁Ph ile mon ▁Bald win ▁and ▁Brig . ▁Gen . ▁August ▁Will ich ▁engaged ▁Jackson ' s ▁brig ade , ▁protect ing ▁Cro xt on ' s ▁withdraw al . ▁Although ▁out number ed , ▁Jackson ▁held ▁under ▁the ▁pressure ▁until