Battle of Warka
1656 CE.
Shown on the map at 51.783°, 21.200°.
The Battle of Warka occurred on April 7, 1656 between the forces of the Polish–Lithuanian Commonwealth, commanded by Stefan Czarniecki, and the forces of the Swedish Empire, commanded by Frederick VI, Margrave of Baden-Durlach. Lasting about two hours, the battle ended in a Polish victory. It was the first Polish success on the open field since the Swedish invasion of Poland in the early summer of 1655, during the Swedish Deluge.
Text from the Wikipedia article Battle of Warka, licensed CC BY-SA 4.0.