Romans and Sassanids in the Soldier-Emperors period (3rd cent. AD)
In the strictest sense, the term ‘Sassanids’ denotes the Iranian dynasty descended from Sassan, and in a wider sense the inhabitants of the territory ruled by the Sassanid dynasty (cf. list of kings p. 216). The Sassanid Ardashir I rose up aginst Parthian rule and annihilated the forces of the Arsacid King Artabanus IV (213–224) on 28 April AD 224 at Hormizdâgan (not localized) in Media; Artabanus IV fell in the battle. The Sassanids went on to take over the entire Parthian kingdom, with the exception of Armenia, in a very short time.