▁historian ▁Fir is ht a ▁claims ▁that ▁the ▁heads ▁of ▁ 8 , 0 0 0 ▁Mong ols ▁were ▁used ▁to ▁build ▁the ▁Si ri ▁Fort ▁commission ed ▁by ▁A la ud din . ▁ ▁Am ir ▁Kh us ra u ▁and ▁another ▁chron ic ler ▁Is ami ▁state ▁that ▁A la ud din ▁sp ared ▁the ▁lives ▁of ▁Ali ▁Beg ▁and ▁T arta q ▁( pro bably ▁because ▁of ▁their ▁high ▁ranks ). ▁According ▁to ▁Am ir ▁Kh us ra u , ▁one ▁of ▁these ▁command ers ▁died ▁" without ▁any ▁harm ▁being ▁done ▁to ▁him ", ▁and ▁the ▁other ▁was ▁" left ▁alone ". ▁He ▁ambigu ously ▁adds ▁that ▁A la ud din ▁" was ▁so ▁successful ▁in ▁sport ▁that ▁he ▁took ▁their ▁lives ▁in ▁one ▁game ▁after ▁another ". ▁According ▁to ▁Is ami , ▁A la ud din ▁made ▁the ▁two ▁Mong ol ▁command ers ▁Am irs ▁( o fficial s ▁with ▁high ▁status ), ▁and ▁also ▁gave ▁each ▁of ▁them ▁an ▁India - born ▁slave ▁girl . ▁Two ▁months ▁later , ▁T arta q ▁started ▁demand ing ▁answers ▁about ▁the ▁fate ▁of ▁his ▁army ▁and ▁his ▁belong ings , ▁in ▁a ▁state ▁of ▁d run ken ▁stup or . ▁As ▁a ▁result , ▁A la ud din ▁ordered ▁him ▁to ▁be ▁killed . ▁S omet ime ▁later , ▁Ali ▁Beg ▁was ▁also ▁killed ▁because ▁of ▁" the ▁evil ▁in ▁his ▁heart ". ▁ ▁Histor ian ▁Peter ▁Jackson ▁spec ul ates ▁that ▁Ali ▁Beg ▁and ▁T arta q ▁might ▁have