In the Sāsānid period, the town Rustam Kuwādh (also spelled Rostag Kavad) flourished at the site.

Rustam Kuwādh was destroyed during the Arab/Muslim conquests of the seventh century CE.

Around this time, ʿAskar Mukram (Arabic: عسکر مکرم, whose name means 'Mukram's encampment') was founded nearby, near the confluence of the canal Āb-i Gargar and the river Kārūn.

Although the early history of the settlement is obscure (with the early accounts of al-Balādhurī and al-Ṭabarī conflicting), the tenth-century Ḥudūd al-ʿālam describes the town as large and prosperous, lying on both sides of the Āb-i Gargar.

[6] The extensive ruins of ʿAskar Mukram remain at Band-i Qīr.