▁power , ▁X ue ▁joined ▁Z hang ▁F ak ui ▁and ▁served ▁in ▁the ▁Gu ang d ong ▁ 4 th ▁Army . ▁ ▁During ▁the ▁Gu ang z hou ▁U pr ising , ▁X ue ' s ▁troops ▁were ▁called ▁into ▁the ▁city ▁to ▁help ▁suppress ▁the ▁Commun ists . ▁ ▁Due ▁to ▁losses ▁suffered ▁over ▁the ▁course ▁of ▁the ▁latter ▁part ▁of ▁ 1 9 2 7 , ▁the ▁ 4 th ▁Army ▁accepted ▁Chi ang ' s ▁offer ▁to ▁re organ ize . ▁ ▁However , ▁internal ▁divisions ▁saw ▁newly ▁appointed ▁commander ▁M iao ▁Pe in an ▁forced ▁out ▁and ▁Z hang ▁F ak ui ' s ▁return ▁as ▁commander ▁of ▁the ▁Gu ang d ong ▁ 4 th ▁Army . ▁ ▁X ue ▁was ▁promoted ▁to ▁become ▁Z hang ' s ▁deput y . ▁ ▁During ▁the ▁Central ▁Pla ins ▁War , ▁the ▁Gu ang d ong ▁ 4 th ▁Army ▁supported ▁the ▁New ▁Gu ang xi ▁C lique ▁in ▁oppos ing ▁Chi ang . ▁ ▁During ▁the ▁combined ▁forces ' ▁entry ▁into ▁H eng y ang , ▁their ▁line ▁of ▁retre at ▁was ▁cut ▁off ▁by ▁Ji ang ▁Gu ang na i ▁and ▁C ai ▁T ing ka i . ▁ ▁In ▁the ▁en su ing ▁Battle ▁of ▁H eng y ang , ▁the ▁combined ▁Gu ang d ong - Gu ang xi ▁army ▁suffered ▁a ▁serious ▁defeat . ▁ ▁The ▁Gu ang d ong ▁ 4 th ▁Army ▁was ▁forced ▁to ▁join ▁Chi ang , ▁Z hang