212), put his other brothers to death and began war against the neighbouring dynasts of Persis.
At the same time he put down the local dynasts and tried to create a strong concentrated power.
Mentor after the conquest of Egypt rose high in the favour of the king, and Memnon, who had taken refuge with Artabazus at the Macedonian court, became a zealous adherent of the Persian king; he assisted Mentor in subduing the rebellious satraps and dynasts in Asia Minor, and succeeded him as general of the Persian troops.
The Persian Empire under Hulagu and his descendants extended from the dominions of Jagatai on the north to that of the Egyptian dynasts on the south, and from the Byzantine Empire on the west to the confines of China.
The religious element is, of course, inseparable from the national, and Ardashir, like all the dynasts of Persis, was an ardent devotee of the Zoroastrian doctrine, and closely connected with the priesthood.