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How did Arab Muslim forces defeat the Sasanian Empire?
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history of Arabia
The Khazneh (“Treasury”), Nabataean ruins at Petra, Jordan.
The defeat of the Sasanian Empire by Arab Muslim forces was facilitated by the empire's internal instability and exhaustion following prolonged wars with the Byzantine Empire. When Yazdegerd III ascended the throne in 632, he inherited a state weakened by succession crises and frequent deposition of rulers by nobles and clergy.1
The expansion, directed by the caliphs Abū Bakr and ‘Umar ibn al-Khaṭṭāb, transformed initial border raids into a systematic campaign. Key military engagements sealed the empire's fate:1
- Battle of Al-Qādisiyyah (636/637): This decisive victory occurred near Al-Ḥīrah, resulting in the death of the Sasanian commander Rostam and leaving the capital, Ctesiphon, vulnerable to capture.21
- Battle of Nahāvand (642): Often referred to as the "Victory of Victories," this battle effectively ended organized Sasanian resistance.21
Following these defeats, Yazdegerd III fled to the northeastern province of Merv. His reign and the Sasanian dynasty ultimately ended in 651 when he was assassinated by a local miller.21