Battle of Vlotho
1638 CE.
Shown on the map at 52.167°, 8.850°.
The Battle of Vlotho was fought on 17 October 1638. It was a victory for the Imperial Army under the command of Field Marshal Melchior von Hatzfeldt, and ended the attempt by Charles I Louis, Elector Palatine, to recapture the Electoral Palatinate.
Text from the Wikipedia article Battle of Vlotho, licensed CC BY-SA 4.0.