Shahrbaraz usurped the throne of the Sasanian Empire from Ardashir III, but was himself killed six weeks later. Shahrbaraz: Shahrbaraz was King of Kings of the Sasanian Empire from 27 April 630 to 9 June 630. He usurped the throne from Ardashir III, and was killed by Iranian nobles after forty days. Before usurping the Sasanian throne he was a spahbed (general) under Khosrow II (590–628). He is furthermore noted for his important role during the climactic Byzantine–Sasanian War of 602–628, and the events that followed afterwards. April 27, 630. Wiki link