in qu ished ▁the ▁territory ▁east ▁of ▁Trans ox ania . ▁Ka id u ▁then ▁co er ced ▁Bar a q ▁into ▁inv ading ▁the ▁Il k han ate . ▁Bar a q ▁attacked ▁first , ▁defe ating ▁Prince ▁Buch in , ▁the ▁governor ▁of ▁K hor as an , ▁and ▁brother ▁of ▁Ab a qa ▁Khan . ▁Ab a qa ▁r ushed ▁from ▁A zer ba ij an ▁and ▁defeated ▁Bar a q ▁near ▁Her at ▁on ▁ 2 2 ▁July ▁ 1 2 7 0 , ▁forcing ▁him ▁to ▁retre at . ▁On ▁the ▁way ▁back ▁he ▁fell ▁from ▁his ▁horse ▁and ▁was ▁cri pp led ▁so ▁he ▁spent ▁the ▁winter ▁in ▁B uk h ara ▁where ▁he ▁died ▁not ▁long ▁after . ▁He ▁converted ▁to ▁Islam ▁before ▁his ▁death . ▁ ▁Bar a q ' s ▁four ▁sons ▁and ▁two ▁sons ▁of ▁Alg hu ▁re bel led ▁against ▁Ka id u ▁in ▁the ▁w ake ▁of ▁Bar a q ' s ▁death , ▁but ▁they ▁were ▁contin ually ▁defeated . ▁Ka id u ▁ent hr oned ▁Neg ü bei ▁as ▁the ▁k han ▁in ▁Trans ox ania . ▁When ▁Neg ü bei ▁re bel led , ▁he ▁was ▁killed ▁and ▁replaced ▁with ▁another ▁k han , ▁Bu qa ▁Tem ür ▁in ▁ 1 2 7 4 . ▁It ' s ▁not ▁certain ▁when ▁Bu qa ▁Tem ür ▁died , ▁but ▁after ▁that , ▁Bar a q ' s ▁son ▁Du wa ▁was ▁ent hr oned ▁as ▁k han . ▁Meanwhile