Page:Political History of Parthia.pdf/50

4 Cyra on the Jaxartes River and three other cities on or near the Tanais (Oxus) River. The conquest of Parthava probably took place during this cam­paign. The country was placed under the control of Hystaspes, patron of Zoroaster and father of Darius. Cyrus lost his life fighting against the Dahae in an attempt to expand his empire to the north­east. At that time the satrapy of Parthava included Hyrcania, which lay between the Elburz Mountains and the Caspian Sea. The satrapy revolted about 521 against Hystaspes and upheld the cause of the Median pretender Fravartish. The first battle was fought at Vishpauzatish on the twenty-second