▁maintained ▁a ▁strong ▁alleg iance ▁to ▁Virginia . ▁ ▁Civil ▁War ▁With ▁the ▁out break ▁of ▁the ▁Civil ▁War , ▁Ch amb l iss ▁was ▁commission ed ▁colon el ▁of ▁the ▁ 1 3 th ▁Virginia ▁Caval ry ▁in ▁July ▁ 1 8 6 1 , ▁and ▁until ▁the ▁fall ▁of ▁ 1 8 6 2 ▁was ▁under ▁the ▁orders ▁of ▁Maj . ▁Gen . ▁D . ▁H . ▁Hill , ▁in ▁the ▁department ▁south ▁of ▁the ▁James ▁River . ▁During ▁the ▁Maryland ▁Camp aign , ▁he ▁was ▁put ▁in ▁command ▁of ▁the ▁forces ▁on ▁the ▁R app ah ann ock ▁River , ▁between ▁W arr ent on ▁and ▁Freder icks burg , ▁with ▁the ▁ 1 3 th ▁Virginia , ▁ 2 nd ▁North ▁Carolina ▁Caval ry , ▁and ▁ 6 1 st ▁Virginia ▁Infantry . ▁He ▁received ▁a ▁comm end ation ▁for ▁his ▁performance ▁from ▁General ▁Robert ▁E . ▁Lee . ▁In ▁November ▁he ▁was ▁assigned ▁with ▁his ▁regiment ▁to ▁W . ▁H . ▁F . ▁" Ro oney " ▁Lee ' s ▁caval ry ▁brig ade . ▁ ▁In ▁April ▁ 1 8 6 3 , ▁when ▁the ▁caval ry ▁corps ▁of ▁the ▁Union ▁Army ▁of ▁the ▁Pot om ac ▁attempted ▁to ▁cross ▁the ▁R app ah ann ock ▁and ▁cut ▁Lee ' s ▁communic ations ▁with ▁Richmond , ▁Ch amb l iss ▁was ▁particularly ▁prominent ▁in ▁turning ▁back ▁this ▁movement . ▁At ▁B ever ly ▁Ford ▁with ▁ 5 0 ▁men , ▁he ▁drove ▁two ▁Federal ▁squad rons ▁into