law ▁and ▁also ▁former ▁general ▁of ▁ ▁D ư ơ ng ▁ Đ ì n h ▁N gh ệ ▁defeated ▁the ▁pot ency ▁of ▁ ▁Ki ề u ▁C ô ng ▁Ti ễ n ▁and ▁also ▁killed ▁him . ▁After ▁that , ▁D ư ơ ng ▁Tam ▁K ha ▁follow ▁Ng ô ▁Qu y ề n ▁as ▁his ▁general . ▁Some ▁historic ▁books ▁said ▁that ▁he ▁and ▁Ng ô ▁X ư ơ ng ▁Ng ậ p , ▁son ▁of ▁Ng ô ▁Qu y ề n , ▁led ▁the ▁army ▁to ▁defeat ▁Ki ề u ▁C ô ng ▁Ti ễ n ▁in ▁ Đ ạ i ▁La . ▁ ▁As ▁the ▁Ng ô ▁Qu y ề n ' s ▁campaign ▁was ▁being ▁developed , ▁Ki ề u ▁C ô ng ▁Ti ễ n ▁sent ▁the ▁en vo ys ▁to ▁Southern ▁Han ▁to ▁pet ition ▁for ▁sending ▁army ▁to ▁help ▁himself . ▁King ▁of ▁Southern ▁Han , ▁Li u ▁Yan , ▁dispatch ed ▁his ▁son , ▁Li u ▁Hung - ts ’ ao ▁to ▁lead ▁an ▁inf antry ▁army ▁to ▁help ▁Ki ề u ▁C ô ng ▁Ti ễ n , ▁he ▁also ▁led ▁a ▁different ▁army ▁to ▁supply ▁his ▁son . ▁But ▁Ki ề u ▁C ô ng ▁Ti ễ n ▁was ▁killed ▁before ▁this ▁army ▁arrived . ▁In ▁the ▁November ▁of ▁ 9 3 8 , ▁ ▁at ▁the ▁Battle ▁of ▁B ạ ch ▁ Đ <0xE1> <0xBA> <0xB1> ng , ▁the ▁army ▁was ▁defeated ▁by ▁Ng ô ▁Qu y ề n ,