▁Army ▁Corps ' ▁control . ▁ 3 0 6 th ▁Art illery ▁Regiment ▁was ▁renamed ▁as ▁Art illery ▁Regiment , ▁ 5 5 th ▁Army ▁Division . ▁ ▁In ▁October ▁ 1 9 8 5 ▁the ▁division ▁was ▁transferred ▁to ▁the ▁ 2 1 st ▁Army ▁following ▁ 1 9 th ▁Army ▁Corps ' ▁dis band ment . ▁At ▁the ▁same ▁time ▁the ▁division ▁was ▁renamed ▁as ▁the ▁ 5 5 th ▁Motor ized ▁Infantry ▁Division ▁( ). ▁ ▁In ▁ 1 9 8 5 ▁Re con na issance ▁Company , ▁ 5 5 th ▁Division ▁took ▁part ▁in ▁recon ▁miss ions ▁during ▁the ▁S ino - V ietnam ese ▁War . ▁During ▁the ▁war ▁it ▁inf lic ted ▁ 1 2 0 ▁cas ual ties ▁to ▁P AV N ▁forces , ▁without ▁anyone ▁killed ▁or ▁injured . ▁ ▁From ▁ 1 9 8 5 ▁to ▁ 1 9 8 9 ▁the ▁division ▁maintained ▁as ▁a ▁test - bed ▁Light ▁Motor ized ▁Infantry ▁Division : ▁▁ 1 6 3 rd ▁Infantry ▁Regiment ▁was ▁transferred ▁to ▁ 6 3 rd ▁Infantry ▁Division ; ▁ 3 rd ▁Battalion , ▁ 1 6 3 rd ▁Infantry ▁returned ▁to ▁the ▁division , ▁and ▁ 1 st ▁Battalion , ▁ 1 6 4 th ▁Infantry ▁and ▁ 3 rd ▁Battalion , ▁ 1 6 5 th ▁Infantry ▁was ▁transferred ▁to ▁ 1 6 3 rd ▁Infantry ▁Regiment . ▁H Q , ▁ 1 6 4 th ▁and ▁ 1 6 5 th ▁Infantry ▁Regiment ▁were ▁dis band ed