, ▁but ▁it ▁caused ▁great ▁comm otion ▁throughout ▁Rose cr ans ' s ▁army ▁as ▁Thomas ▁sent ▁staff ▁officers ▁to ▁seek ▁aid ▁from ▁fellow ▁gener als ▁along ▁the ▁line . ▁West ▁of ▁the ▁Po e ▁field , ▁Bran nan ' s ▁division ▁was ▁man ning ▁the ▁line ▁between ▁Reyn olds ' s ▁division ▁on ▁his ▁left ▁and ▁Wood ' s ▁on ▁his ▁right . ▁His ▁reserve ▁brig ade ▁was ▁march ing ▁north ▁to ▁aid ▁Thomas , ▁but ▁at ▁about ▁ 1 0 ▁a . m . ▁he ▁received ▁one ▁of ▁Thomas ' s ▁staff ▁officers ▁asking ▁for ▁additional ▁assistance . ▁He ▁knew ▁that ▁if ▁his ▁entire ▁division ▁were ▁with dra wn ▁from ▁the ▁line , ▁it ▁would ▁expose ▁the ▁fl anks ▁of ▁the ▁neighbor ing ▁divisions , ▁so ▁he ▁sought ▁Reyn olds ' s ▁advice . ▁Reyn olds ▁agreed ▁to ▁the ▁proposed ▁movement , ▁but ▁sent ▁word ▁to ▁Rose cr ans ▁warning ▁him ▁of ▁the ▁possibly ▁dangerous ▁situation ▁that ▁would ▁result . ▁However , ▁Bran nan ▁remained ▁in ▁his ▁position ▁on ▁the ▁line , ▁apparently ▁wish ing ▁for ▁Thomas ' s ▁request ▁to ▁be ▁approved ▁by ▁Rose cr ans . ▁The ▁staff ▁officer ▁continued ▁to ▁think ▁that ▁Bran nan ▁was ▁already ▁in ▁motion . ▁Rece iving ▁the ▁message ▁on ▁the ▁west ▁end ▁of ▁the ▁D yer ▁field , ▁Rose cr ans , ▁who ▁assumed ▁that ▁Bran nan ▁had ▁already ▁left ▁the ▁line , ▁desired ▁Wood ▁to ▁fill ▁the ▁hole ▁that ▁would ▁be ▁created . ▁His ▁chief ▁of ▁staff , ▁James ▁A . ▁Gar