Answer:
The Mongols and Seljuk Turks.
Explanation:
The dynasty of the Abbasid caliphs (750-1258), was the most durable in the medieval Islamic world, ruling since 750 AD, when they took power from the Umayyads; ending his reign in 1258, when Baghdad was conquered by the Mongols. The five centuries of the Abbasid dynasty in Iraq coincide with the greatest flowering of the Arab-Muslim civilization. The rest of the western terriotiro was taken by the Seljuk Turks.
