over the next fifty years , under the umayyad caliphs , the arabs would launch Military_operation repeated raids Attack into unk asia minor , twice besiege Besieging the byzantine capital of constantinople , and conquer Conquering the byzantine exarchate of africa .

though his forces routed Attack a large umayyad army at the battle of unk in august 686 , mukhtar and his supporters were slain Killing by the unk in april 687 following a series of battles .