Battle of Prostken
1656 CE.
Shown on the map at 53.699°, 22.433°.
The Battle of Prostki was fought near Prostki (German: Prostken), Duchy of Prussia (today in Ełk County, Poland) on October 8, 1656, between forces of the Polish–Lithuanian Commonwealth and allied Crimean Tatars commanded by hetman Wincenty Gosiewski on one side, and on the other allied Swedish and Brandenburg forces commanded by Prince Georg Friedrich of Waldeck, reinforced by the cavalry of Prince Bogusław Radziwiłł. The Commonwealth forces won the battle, annihilating enemy forces and taking Radziwiłł captive.
Text from the Wikipedia article Battle of Prostki, licensed CC BY-SA 4.0.