The Muslim settlements by military garrisons in southern Iran was soon followed by other types of expansion. Some families, for example, took the opportunity to gain control of private estates. Like the rest of Iran, the Muslim conquest thus brought Khuzestan under the rule of the Arabs of the Umayyad and Abbasid Caliphates, until Ya'qub bin Laith as-Saffar, from southeastern Iran, raised the flag of independence once more, and ultimately regained control over Khuzestan, among other parts of Iran, founding the short-lived Saffarid dynasty. From that point on, Iranian dynasties would continue to rule the region in succession as an important part of Iran.