Vologases III of Parthia claimed the throne of the Parthian Empire from about 105 to 147. The period was one of civil war in the Parthian kingdom; for the early part of his reign Vologases contended with Osroes I (105–129) who ruled Mesopotamia.
Following the death of Osroes his rule extended through most of Parthia but had to contend with incursions of the nomadic Alans into Cappadocia, Armenia, and Media and with rebellions in Iran of Mithridates IV (129–140) and an unknown usurper, c. 140.
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