Peroz I
In 458, a Hephthalite king called Akhshunwar helped the Sasanian Emperor Peroz I (458–484) gain the Persian throne from his brother. Before his accession to the throne, Peroz had been the Sasanian for Sistan in the far east of the Empire, and therefore had been one of the first to enter into contact with the Hephthalites and request their help.