sentences:  In the early centuries after the Arab Islamic conquest of the 7th century, Assyria (also known as Athura and Assuristan) was dissolved by the Arabs as a geo-political entity, however native Assyrian (known as Ashuriyun by the Arabs) scholars and doctors played an influential role in Iraq.In the period prior to the establishment of Abbasid rule in AD 750, pastoral Kurds moved into upper Mesopotamia from Persian Azerbaijan, taking advantage of an unstable situation.Cities in northern and northeastern ancient Assyria were raided and attacked by the Kurds of Persian Azerbaijan, "who killed, looted, and enslaved the indigenous population", and the Kurds were moving into various regions in east of ancient Assyria.