5 , ▁during ▁the ▁ 2 0 th ▁year ▁of ▁King ▁Ch ada e ' s ▁reign , ▁My e ong nim ▁D ap - bu ▁led ▁an ▁army ▁and ▁assass in ated ▁the ▁king ▁with ▁the ▁support ▁of ▁some ▁of ▁the ▁nobles ▁and ▁court ▁officials . ▁At ▁the ▁age ▁of ▁ 9 9 , ▁My e ong nim ▁D ap - bu ▁took ▁control ▁of ▁the ▁G og ury e o ▁government . ▁ ▁He ▁invited ▁Prince ▁Go ▁Ba ek - go , ▁the ▁younger ▁brother ▁of ▁King ▁T ae jo , ▁to ▁become ▁the ▁next ▁king . ▁Go ▁Ba ek - go ▁was ▁proc laimed ▁the ▁ 8 th ▁King ▁of ▁G og ury e o ▁during ▁that ▁year , ▁and ▁My e ong nim ▁D ap - bu ▁was ▁given ▁the ▁position ▁of ▁Gu ks ang ▁( 국 상 , ▁ 國 相 , ▁Prime ▁Minister ), ▁and ▁became ▁the ▁first ▁to ▁receive ▁the ▁title ▁in ▁the ▁history ▁of ▁G og ury e o . ▁My e ong nim ▁D ap - bu ▁served ▁faith fully ▁under ▁the ▁new ▁king , ▁and ▁defeated ▁Han ▁Chinese ▁forces ▁at ▁the ▁Battle ▁of ▁J wa - won . ▁ ▁Death ▁and ▁Ac com pl ish ments ▁ ▁My e ong nim ▁D ap - bu ▁died ▁in ▁ 1 7 9 , ▁at ▁the ▁age ▁of ▁ 1 1 3 ▁( 1 1 2 ▁by ▁Western ▁convention ), ▁after ▁leading ▁G og ury e o ▁forces ▁to ▁victory ▁against ▁a ▁trem end ous