Yazdegerd III

Type Figure Region Sasanian Persia Time c. 624–651 Also known as Yazdegerd、Last Sasanian shah

Last legitimate shah of the Sasanian dynasty, acceding in 632 CE; faced rapid Arab Muslim expansion, suffered repeated defeats, fled east after the f…

Timeline

632–634Ctesiphon · Sasanian EmpireAmid prolonged civil war after the death of Khosrow II, the young Yazdegerd III was enthroned as shah in 632, attempting to restore royal authority within the framework of the ruined empire.
635–637Iraq and Mesopotamia · MesopotamiaArab forces defeated the Persian army at battles including Qadisiyyah; Ctesiphon fell in 637; Yazdegerd III withdrew eastward and the empire's western territories were rapidly lost.
638–651Merv · KhorasanAfter losing the capital, he wandered through Khorasan seeking aid, pinning hopes on eastern nobles and Central Asian powers; he was killed around Merv in 651, ending the Sasanian royal line.

Sources

The Cambridge History of Iran, Vol. 3(1): The Seleucid, Parthian and Sasanian Periods — Ehsan Yarshater (ed.) (1983)
Encyclopaedia Iranica: Yazdegerd III https://www.iranicaonline.org/articles/yazdegerd-iii