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Vologeses V (or IV) (fl. 2nd and 3rd centuries), king of Parthia who
reigned 191-208/209. He first appeared in 191 as a rebel against his
father Vologeses III, whom he succeeded in 192. In 193 he stirred up a
rebellion in the Roman client kingdoms of Osroene and Adiabene, but in
195 the Romans under Septimius Severus recovered the districts. After the
Roman army departed, Vologeses again swept through Mesopotamia and
restored his suzerainty over Adiabene. Subsequently Septimius Severus
launched another campaign (197/198-202), advancing into Mesopotamia,
occupying Nisibis, and plundering Ctesiphon. He failed, however, in his
attempts to conquer the frontier fortress of Hatra. Little more is known
of Vologeses' reign; he was succeeded by his son Vologeses VI (or V) in
209.