Battle of the Slaak
1631 CE.
Shown on the map at 51.631°, 4.200°.
The naval Battle of the Slaak (12 and 13 September 1631) was a Dutch victory during the Eighty Years' War. The Dutch prevented the Spanish army from dividing the Dutch United Provinces in two.
Text from the Wikipedia article Battle of the Slaak, licensed CC BY-SA 4.0.