▁taken ▁prisoner ▁by ▁their ▁leader ▁Es en ▁Ta ishi . ▁Due ▁to ▁U w ais ' ▁royal ▁line age , ▁Es en ▁Ta ishi ▁treated ▁him ▁with ▁respect ▁and ▁released ▁him . ▁U w ais ▁suffered ▁two ▁more ▁defe ats ▁against ▁the ▁O ir ats ▁and ▁was ▁captured ▁a ▁second ▁time . ▁He ▁was ▁let ▁go ▁after ▁sending ▁his ▁sister ▁as ▁host age ▁to ▁Es en ▁Ta ishi ' s ▁family . ▁U w ais ▁died ▁in ▁ 1 4 2 9 . ▁Two ▁fa ctions ▁supporting ▁his ▁two ▁sons ▁Y un us ▁Khan ▁and ▁Es en ▁Bu qa ▁II ▁quar re led ▁over ▁the ▁throne ▁with ▁Es en ▁Bu qa ▁II ▁emer ging ▁as ▁the ▁vict or . ▁Y un us ▁fled ▁to ▁Sam ark and . ▁Under ▁Es en ▁Bu qa ▁II , ▁the ▁powerful ▁D ug hl at ▁Say y id ▁Ali , ▁who ▁had ▁helped ▁him ▁to ▁the ▁throne , ▁became ▁very ▁influ ential ▁and ▁held ▁both ▁K ucha ▁and ▁K ash gar . ▁In ▁ 1 4 5 1 , ▁Es en ▁Bu qa ▁II ▁ra ided ▁the ▁northern ▁border ▁of ▁the ▁Tim ur id ▁Empire . ▁The ▁Tim ur id ▁r uler ▁Ab u ▁Sa ' id ▁Mir za ▁sch emed ▁to ▁split ▁the ▁M og h uls ▁in ▁two , ▁so ▁he ▁sum mon ed ▁Y un us ▁in ▁ 1 4 5 6 ▁and ▁supported ▁his ▁authority ▁in ▁the ▁I li ▁region . ▁Y un us ▁tried ▁to ▁conquer ▁K ash gar ▁but ▁was ▁rep