ancient Iran Formation of the Parthian state also known as Persia

Although the two new kingdoms, that of Arsaces I’s Parthians and the Greco-Bactrian kingdom of Diodotus I, sprang up almost simultaneously and very near each other, there were notable differences between them. The motivating force behind the rebellion in Bactria was an association—or perhaps even a collaboration—between the local nobility (large landholders who dominated the whole indigenous population) and the local Greek community. Both groups were opposed to the Macedonian domination represented by the Seleucid dynasty.

The makeup of the Parthian kingdom seems to have been different. It was essentially built on the relationship of the inhabitants of Parthia to the neighbouring tribes outside the static frontiers—an ethnic mass, half nomadic and half settled, that inhabited the north of Iran. The success of Arsaces and his men was based on their strength, their spirit, and the weakness of their enemies. The Greek element present in Parthia does not seem to have played a role similar to that played by its counterpart in Bactria. In fact, the Parthians, at least initially, may have been hostile to the local Greek populations. During their war with Antiochus III (see below), they massacred all the Greek inhabitants of the city of Syrinx in Hyrcania.