There he bore the title of Kirmanshah (meaning "king of Kirman"), which would serve as the name of the city he later founded in western Iran.

In Armenia, he deposed his insubordinate vassal Khosrov IV and installed the latter's brother Vramshapuh on the Armenian throne.

[14][15] The boundary stretched through Theodosiopolis in the north and Amida in the south, which meant that most of Armenia remained in Sasanian hands.

The Arsacid monarchy in the Iranian part of Armenia (which became known as Persarmenia)[16] was maintained, with Khosrov IV ruling the country as a Sasanian vassal.

The immediate cause of Khosrov IV's removal may have been his appointment of Sahak as the patriarch of Persarmenia without consulting the Iranian court.

Bahram IV allowed the Roman captives to stay at Veh-Ardashir and Ctesiphon, where they were given rations, which included bread, wine and oil.

[21][22] According to the modern historian Scott McDonough, Bahram IV was killed for his attempt to reduce the authority of the powerful Parthian noble families (known as the wuzurgan) who formed the bulk of the Iranian feudal army.

[23] Bahram IV was succeeded by his brother Yazdegerd I, who, aware of the previous actions of the nobility, strived to restrict their power.

[25] The assessment of Arabic sources towards Bahram IV is mixed, although he is generally portrayed in a positive light.

The wings are attached to a mural crown, which was a symbol of the supreme god in Zoroastrianism, Ahura Mazda.

Under Bahram IV, the eastern province of Abarshahr produced its largest proportion of coinage (19%) throughout Sasanian history.

[35] A mint was also established in the northwestern province of Adurbadagan to support the construction of the Caspian Gates to protect the Caucasus border against Hunnic incursions.

[6][36] This fallen foe resembles the same figure portrayed on the rock relief of Ardashir II, which most likely depicted the Roman emperor Julian, who fell in battle against the Sasanians in 363.