What was one thing that led to the muslim empires success

Muslim conquests following Muhammad's death led to the creation of the caliphates, occupying a vast geographical area; conversion to Islam was boosted by missionary activities, particularly those of imams, who intermingled with local populations to propagate the religious teachings.

Explanation:

answer; the answer to the first question is (king james ii was replaced by his daughter mary and her dutch husband william of orange;