The Byzantine victory at Bathys Ryax destroyed the Paulician principality and eliminated a persistent threat on the empire's eastern frontier.
Key Facts
- Date
- 872 or 878
- Victor
- Byzantine Empire
- Paulician leader killed
- Chrysocheir
- Paulician base
- Tephrike, eastern Byzantine border
- Outcome
- Destruction of Paulician principality
Location
Cause → Event → Consequence
The Paulicians, a Christian sect persecuted by the Byzantine state, had established an autonomous principality at Tephrike on Byzantium's eastern border. They allied with the Muslim emirates of the Thughur and the Abbasid Caliphate, repeatedly raiding and threatening Byzantine territory, making them a significant military and political danger to the empire.
At Bathys Ryax, Byzantine forces engaged the Paulician army in a decisive pitched battle. The Paulicians were routed, and their leader Chrysocheir was killed during the engagement. The battle represented a culminating confrontation between the empire and the breakaway Paulician state that had long operated on its eastern frontier.
The defeat shattered Paulician military power and fatally undermined their principality. Tephrike fell shortly after, and the Paulician territory was annexed by Byzantium. The battle thus removed a longstanding dual threat—internal religious dissent backed by military force and external collaboration with Muslim enemies—from the empire's eastern borderlands.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Side B
1 belligerent
Chrysocheir.