▁also ▁concerned ▁about ▁a ▁s izable ▁Union ▁force ▁under ▁Maj . ▁Gen . ▁Am bro se ▁E . ▁Burn side ▁that ▁was ▁threaten ing ▁Kno x ville . ▁B rag g ▁with d rew ▁his ▁forces ▁from ▁advanced ▁positions ▁around ▁Bridge port , ▁which ▁left ▁Rose cr ans ▁free ▁to ▁man eu ver ▁on ▁the ▁northern ▁side ▁of ▁the ▁Tennessee ▁River . ▁He ▁concentr ated ▁his ▁two ▁inf antry ▁corps ▁around ▁Ch att ano oga ▁and ▁re lied ▁upon ▁caval ry ▁to ▁cover ▁his ▁fl anks , ▁extending ▁from ▁northern ▁Alabama ▁to ▁near ▁Kno x ville . ▁ ▁The ▁Confeder ate ▁government ▁decided ▁to ▁attempt ▁a ▁strateg ic ▁revers al ▁in ▁the ▁West ▁by ▁sending ▁B rag g ▁rein for c ements ▁from ▁Virginia — L t . ▁Gen . ▁James ▁Long street ▁with ▁two ▁divisions ▁from ▁his ▁First ▁Corps , ▁Army ▁of ▁Northern ▁Virginia — in ▁addition ▁to ▁the ▁rein for c ements ▁from ▁Mississippi . ▁Ch ick am aug a ▁was ▁the ▁first ▁large ▁scale ▁Confeder ate ▁movement ▁of ▁troops ▁from ▁one ▁the ater ▁to ▁another ▁with ▁the ▁aim ▁of ▁ach ieving ▁a ▁period ▁of ▁numerical ▁superior ity ▁and ▁gain ing ▁decis ive ▁results . ▁B rag g ▁was ▁now ▁more ▁satisfied ▁with ▁the ▁resources ▁provided , ▁and ▁looked ▁to ▁strike ▁the ▁Union ▁Army ▁as ▁soon ▁as ▁he ▁achieved ▁the ▁strength ▁he ▁needed . ▁ ▁" R iver ▁of ▁Death " ▁The ▁campaign ▁and ▁major ▁battle ▁take ▁their ▁name ▁from ▁West ▁Ch ick am aug a ▁Creek . ▁In ▁popular ▁histor