| Conflict: | Battle of Ctesiphon (165) |
| Partof: | the Parthian war of Lucius Verus |
| Date: | 165 |
| Place: | Ctesiphon, Mesopotamia |
| Result: | Roman victory |
| Combatant1: | Roman Empire |
| Combatant2: | Parthian Empire |
| Commander1: | Avidius Cassius |
| Commander2: | Vologases IV |
| Strength1: | Capable of raising many soldiers |
| Strength2: | Capable of raising many soldiers |
| Casualties1: | Heavy |
| Casualties2: | Heavy |
The Battle of Ctesiphon in 165 AD was part of the wider Roman-Parthian War. The Parthians had tried but failed to take Armenia in the previous years, but a Roman counter-attack saw them lay a successful siege and capture of Ctesiphon.[1]
Like the previous invasion attempts, the Romans made no attempt at permanently occupying Ctesiphon. In the end, the Parthians managed to re-group. However, the Parthians were becoming steadily weaker, with more concessions given to the Roman Empire and the Parthian nobles and vassal kingdoms.