Ended the Roman–Parthian War of 58–63 by establishing a compromise over Armenia that held for roughly fifty years.
Key Facts
- Treaty concluded
- 63 CE
- War ended
- Roman–Parthian War of 58–63
- Armenian throne arrangement
- Arsacid prince rules; Rome holds right of investiture
- Peace duration
- Approximately 51 years, until 114 CE
- Arsacid rule of Armenia lasted until
- 428 CE
By the Numbers
Location
Cause → Event → Consequence
The Roman–Parthian War of 58–63 arose from competing imperial claims over Armenia, a buffer kingdom between the two empires. Rome and Parthia each sought to install a client ruler on the Armenian throne, leading to prolonged military conflict that neither side could decisively resolve on the battlefield.
At the frontier town of Rhandeia, Rome and Parthia concluded a compromise peace treaty in 63 CE. Under its terms, an Arsacid prince would occupy the Armenian throne, satisfying Parthian dynastic interests, while the Roman emperor retained the power of nomination and investiture, preserving Roman prestige and formal suzerainty.
The treaty produced a stable if ambiguous shared influence over Armenia that lasted until 114 CE, when Emperor Trajan invaded Armenia and Parthia, briefly making Armenia a Roman province. After Hadrian relinquished direct control in 118 CE, the Arsacid dynasty continued ruling Armenia, mostly as client kings, until the kingdom was partitioned in 428 CE between the Eastern Roman and Sasanian empires.
Political Outcome
Armenia to be ruled by an Arsacid prince nominated by the Roman emperor, establishing shared but ambiguous Roman-Parthian suzerainty over Armenia.
Ongoing armed contest between Rome and Parthia for direct control of Armenia
Compromise arrangement: Arsacid dynasty holds Armenian throne; Rome retains investiture rights