Battle of Megara
1359 CE.
Shown on the map at 37.000°, 57.000°.
The Battle of Megara occurred in 1359 between an alliance of the Christian states of southern Greece (the Despotate of the Morea, the Principality of Achaea, the Knights Hospitaller and the Republic of Venice), and of a Turkish raiding fleet. The battle was a victory for the allies.
Text from the Wikipedia article Battle of Megara (1359), licensed CC BY-SA 4.0.