▁Dav ison , ▁were ▁close ▁to ▁mut iny . ▁P ushed ▁by ▁both ▁Abr ams ▁and ▁Min h ▁to ▁rel ieve ▁him , ▁Th i ệ u ▁finally ▁acc eded ▁and ▁in ▁April ▁ 1 9 7 1 ▁brought ▁Col . ▁L ê ▁V ă n ▁H ư ng ▁up ▁from ▁Ph ong ▁Din h ▁Province ▁to ▁take ▁over ▁the ▁batter ed ▁Division . ▁Unfortunately , ▁H ư ng ▁was ▁the ▁one ▁AR V N ▁officer ▁whose ▁candid acy ▁American ▁advis ers ▁had ▁specifically ▁recommended ▁against . ▁To ▁the ▁desp air ▁of ▁US ▁advis ers ▁Hi ế u ▁was ▁promoted ▁to ▁deput y ▁commander ▁of ▁I ▁Corps . ▁ ▁Sv ay ▁Ri ê ng , ▁ 1 9 7 4 ▁ ▁In ▁ 1 9 7 4 , ▁as ▁Deput y ▁Commander ▁of ▁Oper ations / III ▁Corps , ▁assistant ▁to ▁General ▁Ph ạ m ▁Qu ố c ▁Th u ầ n , ▁Hi ế u ▁applied ▁Bl itz krie g ▁( light ning ▁war ) ▁tact ics ▁to ▁alle vi ate ▁the ▁pressure ▁ex ert ed ▁by ▁ 5 th ▁N VA ▁Division ▁origin ating ▁from ▁Sv ay ▁R ien g ▁Province ▁in ▁the ▁Par rot ' s ▁Be ak ▁area ▁of ▁Camb od ian ▁territory ▁aim ing ▁at ▁ Đ ứ c ▁Hu ệ ▁base ▁camp . ▁Hi ế u ▁employed ▁twenty ▁mobile ▁batt al ions ▁to ▁surr ound ▁the ▁Par rot ' s ▁Be ak ▁area . ▁Second ly , ▁on ▁April ▁ 2 7 , ▁he ▁launched ▁ 4