Battle of Mari
1266 CE.
Shown on the map at 36.531°, 36.364°.
The Battle of Mari, also called the Disaster of Mari, was a battle between the Egyptians of the Mamluk Sultanate and the Armenians of Cilician Armenia on 24 August 24 1266.
Text from the Wikipedia article Battle of Mari, licensed CC BY-SA 4.0.