▁to ▁rein force ▁the ▁defense ▁of ▁Ple iku ▁and ▁hel i - l ifts ▁art illery ▁batter ies ▁to ▁several ▁locations ▁near ▁the ▁amb ush ▁site ▁to ▁support ▁the ▁relief ▁column ▁when ▁under ▁attacked . ▁ ▁This ▁plan ▁neutral ized ▁the ▁ 6 6 th ▁N VA ▁Regiment , ▁which ▁remained ▁in active ▁in ▁the ▁Ch ư ▁Pr ô ng ▁area , ▁destroyed ▁the ▁ 3 3 rd ▁N VA ▁Regiment ▁at ▁the ▁amb ush ▁site , ▁and ▁the ▁ 3 2 nd ▁N VA ▁Regiment ▁abandoned ▁the ▁sie ge ▁of ▁P lei ▁Me ▁and ▁with d rew ▁into ▁the ▁surrounding ▁j ung le . ▁ ▁Li ên ▁K ế t ▁ 6 6 ▁ 4 2 nd ▁Regiment , ▁ 2 2 nd ▁Division , ▁rein for ced ▁by ▁ 3 rd ▁Air bor ne ▁Task ▁Force ▁established ▁a ▁blocking ▁position ▁on ▁the ▁mountain ▁side , ▁joined ▁force ▁with ▁an ▁arm ored ▁squad ron ▁of ▁M 1 1 3 s ▁in ▁swe eping ▁the ▁enemy ▁from ▁National ▁Route ▁ 1 ▁into ▁the ▁mountains ▁at ▁Ph ù ▁C ũ ▁Pass ▁in ▁B ì n h ▁ Đ ị n h ▁Province . ▁Infantry men ▁following ▁the ▁M 1 1 3 s ▁launched ▁fier ce ▁assault s , ▁after ▁an ▁initial ▁sal vo ▁of ▁art illery . ▁Air bor ne ▁Task ▁Force ▁Commander , ▁Lieutenant ▁Colonel ▁N gu y ễ n ▁K ho a ▁Nam ▁obser ving ▁the ▁battle ▁from ▁the ▁mountains ide ▁with ▁bin oc ular ▁stated : ▁" Col onel ▁Hi ế