 Abaqa died in 1282 and was briefly replaced by his brother Tekuder , who had converted to Islam . Tekuder reversed Abaqa 's policy of seeking an alliance with the Franks , offering instead an alliance to the Mamluk Sultan Qalawun , who continued his own advance , capturing the Hospitaller fortress of Margat in 1285 , <unk> in 1287 , and the County of Tripoli in 1289 . However , Tekuder 's pro @-@ Muslim stance was not popular , and in 1284 , Abaqa 's Buddhist son Arghun , with the support of the Great Khan Kublai , led a revolt and had Tekuder executed . Arghun then revived the idea of an alliance with the West , and sent multiple envoys to Europe . 
