▁China ▁ ▁Despite ▁his ▁amb itions , ▁T ais un ▁Khan ▁was ▁still ▁far ▁more ▁incl ined ▁towards ▁peace ful ▁relations ▁with ▁M ing ▁China ▁than ▁his ▁commander ▁Es en . ▁He ▁kept ▁a ▁friendly ▁relationship ▁with ▁the ▁M ing ▁court . ▁His ▁ta ishi , ▁Es en , ▁was ▁even ▁more ▁am bit ious ▁and ▁wanted ▁to ▁restore ▁the ▁glory ▁of ▁the ▁Mong ol ▁Empire ▁in ▁name ▁and ▁territory . ▁Es en ▁first ▁directed ▁his ▁attention ▁to ▁the ▁H ami ▁O asis ▁where ▁the ▁M ing ▁al ly , ▁Bor j igin ▁prince ▁desc ended ▁from ▁Ch ag ata i ▁Khan , ▁ruled . ▁Re pe ated ▁ra ids ▁and ▁thre ats ▁by ▁Es en ▁forced ▁him ▁to ▁surrender ▁in ▁ 1 4 4 8 . ▁ ▁Es en ▁then ▁attacked ▁the ▁G ans u ▁region ▁where ▁the ▁Mong ol ▁satellite ▁states ▁of ▁the ▁M ing , ▁known ▁collect ively ▁as ▁the ▁Three ▁Gu ards , ▁were ▁located . ▁The ▁F uy u ▁guard ▁was ▁forced ▁to ▁fle e , ▁and ▁Es en ▁appointed ▁his ▁own ▁governor ▁in ▁the ▁area . ▁T ais un ▁Khan ▁personally ▁led ▁the ▁attack ▁on ▁the ▁T aining ▁guard . ▁After ▁that , ▁Es en ▁also ▁pl under ed ▁the ▁Do y in ▁Uri ank hai ▁guard , ▁forcing ▁them ▁to ▁surrender . ▁With ▁the ▁submission ▁of ▁the ▁Three ▁Gu ards , ▁the ▁rev ived ▁Y uan ▁dynast y ▁became ▁a ▁direct ▁threat ▁to ▁M ing . ▁▁ ▁When ▁the ▁M ing ▁refused ▁the ▁Mong ols ▁their