Battle of Curzola
1298 CE.
Shown on the map at 42.867°, 16.973°.
The Battle of Curzola (today Korčula, southern Dalmatia, now in Croatia) was a naval battle fought on 9 September 1298 between the Genoese and Venetian navies. It was a disaster for Venice, a major setback among the many battles fought in the 13th and 14th centuries between Pisa, Genoa, and Venice in a long series of wars for the control of Mediterranean and Levantine trade.
Text from the Wikipedia article Battle of Curzola, licensed CC BY-SA 4.0.