The rule of the Kushano-Sasanians ended in the mid-4th century CE, when they lost their territories to the invading
Kidarites Huns. Peroz was a successor of the first Kidarite ruler
Kirada, and the immediate predecessor of the famous Kidarite ruler
Kidara. He was previously thought to be one of the last of the
Kushano-Sasanids Kushanshas rulers. He minted his own coinage and used the title of
Kushansha, ie "Kings of the Kushans".
Siege of Amida (359 CE) Historian
Khodadad Rezakhani suggests that Peroz was at the
Siege of Amida in 359 CE, where a Kidarite army under
Grumbates is known to have supported the Sasanian army of
Shapur II in besieging the city held by the Romans. In his account of the siege,
Ammianus Marcellinus describes in detail the costume, and in particular the headgear of one of the besieging rulers: ==Coinage in the style of the Kushano-Sasanians==