Siege of Gundishapur
642 CE.
Shown on the map at 32.283°, 48.517°.
The Muslim conquest of Khuzestan, or the Arab conquest of Khuzestan, took place from 637/8 to 642 and resulted in the acquisition of the rich Khuzestan Province by the Rashidun Caliphate.
Text from the Wikipedia article Muslim conquest of Khuzestan, licensed CC BY-SA 4.0.