According to Al-Tabari's report, Ardashir was born in the outskirts of Istakhr, Pars. Al-Tabari adds that Ardashir was sent to the lord of Fort Darabgard when he was seven years old. After the lord's death, Ardashir succeeded him and became the commander of Fort Darabgard. Al-Tabari continues that afterward, Papak overthrew the local Persian shah named Gochihr and appointed his son, Shapur, instead of him. According to Al-Tabari's report, Shapur and his father, Papak, suddenly died and Ardashir became the ruler of Pars. Tension rose between Ardashir and the Parthian empire and eventually on April 28, 224, Ardashir faced the army of Artabanus IV in the Hormozdgan plain and Artabanus, the Parthian shahanshah, was killed during the battle.