Beerzan

Piruz Khosrow (Middle Persian: Pērōz Khusraw), also known as Piruzan or Firuzan, was a powerful Persian aristocrat who was the leader of the Parsig (Persian) faction that controlled much of the affairs of the Sasanian Empire during the civil war of 628-632. He was killed at the Battle of Nahāvand in 642.

Piruz is first mentioned in 628, as one of the conspirators against Khosrow II. During this period Piruz assumed the leadership of the Parsig faction, while the Ispahbudhan Farrukh Hormizd, assumed the leadership of the Pahlav (Parthian) faction. After the overthrow of Khosrow, the latter's son Kavadh II became the new king of the Sasanian Empire. Piruz was then elected as his wuzurg framadār (vizier or prime minister); reportedly, under Kavadh's orders, he executed all of Kavadh's brothers and half-brothers. Kavadh then made peace with the Byzantine Empire, which restored all their lost territories.

However, shortly after these events, the Parsig and Pahlav faction came into conflict, which divided the resources of the country, and later resulted in a devastating plague that spread over western Iran, which killed half of the population along with Kavadh II, who was succeeded by Ardashir III. Piruz was then succeeded by Mah-Adhur Gushnasp as the wuzurg framadār of the empire, while Piruz remained as the commander of the royal guard (hazarbed).

One year later, Shahrbaraz, with a force of 6,000 men, marched towards Ctesiphon and besieged the city. Shahrbaraz, however, was unable to capture the city, and then made an alliance with Piruz. He also made an alliance with Namdar Jushnas, the spahbed of Nimruz. Shahrbaraz, with the aid of these two powerful figures, captured Ctesiphon, and executed Ardashir III, along with his minister Mah-Adhur Gushnasp, including other Sasanian nobles like Ardabīl. Forty days later, Shahrbaraz was murdered by Farrukh Hormizd, who then made Borandukht, the daughter of Khosrow II, ascend the throne.

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