▁Ab a qa ▁inv aded ▁Trans ox ania ▁in ▁ 1 2 7 2 ▁and ▁s ack ed ▁B uk h ara , ▁carrying ▁off ▁ 5 0 , 0 0 0 ▁capt ives . ▁ ▁In ▁ 1 2 7 5 , ▁Du wa ▁joined ▁Ka id u ▁in ▁the ▁war ▁against ▁the ▁Y uan ▁dynast y ▁but ▁were ▁rep elled . ▁In ▁ 1 2 9 5 , ▁Du wa ▁inv aded ▁the ▁P un j ab ▁and ▁dev ast ated ▁the ▁region . ▁Several ▁invas ions ▁of ▁the ▁Del hi ▁Sultan ate ▁also ▁occurred ▁but ▁none ▁were ▁able ▁to ▁make ▁any ▁head way . ▁In ▁September ▁ 1 2 9 8 , ▁Du wa ▁captured ▁Tem ür ▁Khan ' s ▁son - in - law , ▁K org uz , ▁and ▁put ▁him ▁to ▁death , ▁but ▁immediately ▁after ▁that ▁suffered ▁a ▁dis astr ous ▁defeat ▁by ▁Y uan ▁forces . ▁In ▁ 1 3 0 1 ▁they ▁were ▁defeated ▁again ▁in ▁an ▁attack ▁on ▁Kar ak orum ▁and ▁Ka id u ▁died ▁during ▁the ▁retre at . ▁ ▁Foreign ▁wars ▁( 1 3 0 1 – 1 3 2 5 ) ▁After ▁Ka id u ' s ▁death ▁in ▁ 1 3 0 1 , ▁both ▁Du wa ▁and ▁Ka id u ' s ▁son ▁Chap ar ▁recognized ▁Y uan ▁authority ▁in ▁ 1 3 0 3 . ▁However ▁Du wa ▁threw ▁off ▁his ▁alleg iance ▁to ▁Chap ar . ▁Both ▁the ▁Y uan ▁dynast y ▁and ▁Du wa