When Imperial forces moved east under the command of Emperor Verus after the forces of Vologases IV of Parthia attacked Armenia, the Romans' defense of the eastern territories was hampered when large numbers of troops succumbed to the disease.
The plot concerns king Vologeso (based on Vologases IV of Parthia, 148-191) who is deposed by Lucio Vero (loosely based on Lucius Verus, 130–169) and restored by another Roman, Flavio (created for the story by Zeno).
Parthia | Arsaces I of Parthia | Vologases III of Parthia | Vologases IV of Parthia | Mithridates I of Parthia | Tiridates I of Parthia | Pacorus II of Parthia | Vonones II of Parthia | Vologases V of Parthia | Vologases I of Parthia | Parthia (horse) | Orodes II of Parthia | Artabanus V of Parthia | Artabanus IV of Parthia |
King Vologases IV of Parthia dies after a 44-year reign and is succeeded by his son Vologases V.