Complex sentence: The reign of Al-Aziz was primarily significant for the strengthening of Fatimid power in Egypt and Syria, only very recently conquered (969)-the Bedouin Tayyi' tribe was defeated in Palestine 982 and finally subjugated at Damascus 983.
Split into simpler sentences: The reign of Al-Aziz was primarily significant for the strengthening of Fatimid power in Egypt and Syria, only very recently conquered (969). As a result the Bedouin Tayyi' tribe could be defeated in Palestine 982 and finally subjugated at Damascus 983.