 The battle was fought on 28 April 224, with Artabanus IV being defeated and killed, marking the end of the Arsacid era and the start of 427-years of Sasanian rule.The chief secretary of the deceased Arsacid king, Dad-windad, was afterwards executed by Ardashir I. Thenceforth, Ardashir I assumed the title of "shahanshah" ("King of Kings") and started the conquest of an area which would be called Iranshahr ("Ērānshahr").He celebrated his victory by having two rock reliefs sculptured at the Sasanian royal city of Ardashir-Khwarrah (present-day Firuzabad) in his homeland, Pars.