In 590, Hormizd IV had his prominent general Bahram Chobin disgraced and dismissed. Bahram, infuriated by Hormizd's actions, responded by rebelling, and due to his noble status and great military knowledge, was joined by his soldiers and many others. He then appointed a new governor for Khorasan, and afterwards set for the Sasanian capital of Ctesiphon. The legitimacy of the House of Sasan had been established in the credence that the halo of kingship, the "xwarrah", was given to the first Sasanian shah, Ardashir I () and his family following the latter's conquest of the Parthian Empire. This was now, however, disputed by Bahram Chobin, thus marking the first time in Sasanian history that a Parthian dynast challenged the legitimacy of the Sasanian family by rebelling.