Under him, the Kushano-Sasanians further expanded their domains into the west, pushing the weakened Kushan Empire to Mathura in North India.

[2] "Kushano-Sasanian" is a historiographic term used by modern scholars when referring to a dynasty of monarchs who supplanted the Kushan Empire in the Bactria region, and ultimately in both Kabulistan and Gandhara as well.

[6] Like his predecessor Ardashir I Kushanshah, Peroz is called the "Great Kushan King" and "Mazdean (Zoroastrian) lord" on his coins.

Peroz is holding an investiture wreath over an altar and raising the left hand in gesture of benediction.

[12] The gold coins of Peroz tended to be scyphate and to imitate the design of Kushan ruler Vasudeva I.

[13] It was around this time that the Kushano-Sasanians began to expel the Kushans from Gandhara, pushing them to Mathura in North India, where their power was diminished from that of kings to local princes.

[16] On the inscription, Shapur I proclaimed himself as the suzerain of several regions, including that of the Kushano-Sasanians: ...I, the Mazda-worshipping lord, Shapur, king of kings of Iran and An-Iran… (I) am the Master of the Domain of Iran (Ērānšahr) and possess the territory of Pars, Parthia… Hindestan, the Domain of the Kushan up to the limits of Peshawar and up to Kash, Sogdia, and Chachestan.