Shahrbaraz usurped the throne from Ardashir III, and was killed by Iranian nobles after forty days.
18 Facts About Shahrbaraz
2.
Shahrbaraz belonged to the House of Mihran, one of the Seven Parthian clans; he was the son of a certain Ardashir.
3.
Shahrbaraz was married to the sister of the Sasanian king Khosrow II, Mirhran, with whom Shahrbaraz had one boy named Shapur-i Shahrvaraz.
4.
Furthermore, Shahrbaraz defeated a Byzantine army near Adhri'at, which is mentioned in the Quran.
5.
In 618, Shahrbaraz was ordered by Khosrow II to invade Egypt, and by 619, Alexandria, the capital of Byzantine Egypt, was in Sasanian hands.
6.
Shahrbaraz was sent over there to deal with him, but was eventually defeated by him.
7.
Shahrbaraz stationed his forces across the river from the Byzantines.
8.
Shahrbaraz feigned retreat to lead the Byzantines into an ambush, and the vanguard of Heraclius' army was destroyed within minutes.
9.
The army of Shahrbaraz stationed themselves at Chalcedon, while the Avars placed themselves on the European side of Constantinople and destroyed the Aqueduct of Valens.
10.
The letter said that Kardarigan should kill Shahrbaraz and take his army back to Ctesiphon, but the bearers of the letter were intercepted in Galatia by Byzantine soldiers, who gave the letter to the future emperor Constantine III who in turn gave it to Heraclius.
11.
Shahrbaraz accepted his proposal and met Heraclius at Constantinople, where he read the letter and switched over to Heraclius' side.
12.
Shahrbaraz then changed the contents of the letter, making it state that Khosrow II wanted 400 officers killed, ensuring that Kardarigan and the rest of the army remained loyal to him.
13.
Shahrbaraz then moved his army to northern Syria, where he could easily decide to support either Khosrow or Heraclius at a moment's notice.
14.
Shahrbaraz disobeyed, and moved to Asuristan, where he set up a camp in Ardashir Khurrah.
15.
Shahrbaraz was unable to capture the city, and then made an alliance with Piruz Khosrow, the leader of the Parsig faction, and the previous minister of the Empire during the reign of Ardashir's father, Kavad II.
16.
Shahrbaraz made an alliance with Namdar Gushnasp, who had succeeded him as the spahbed of Nemroz in 626.
17.
Shahrbaraz then became the new shah of the Sasanian Empire, and killed Kardarigan, who opposed Shahrbaraz after his usurpation of the Sasanian throne.
18.
Shahrbaraz's reign did not last long, and he was shortly deposed by the Sasanian nobles.