Battle of Zierikzee
1304 CE.
Shown on the map at 51.650°, 3.916°.
The battle of Zierikzee was a naval battle between a Flemish fleet and an allied Franco-Hollandic fleet which took place on 10 and 11 August 1304. The battle, fought near the town of Zierikzee, ended in a Franco-Dutch victory. The battle is part of a larger conflict between the Count of Flanders and his French feudal lord, King Philip IV of France (1296–1305).
Text from the Wikipedia article Battle of Zierikzee, licensed CC BY-SA 4.0.