Battle of Ergeme
1560 CE.
Shown on the map at 57.806°, 25.816°.
The Battle of Ērģeme (also Battle of Ermes) (Estonian: Härgmäe lahing; German: Schlacht bei Ermes; Russian: Битва под Эрмесом; Latvian: Ērģemes kauja) was fought on 2 August 1560 in present-day Latvia (near Valka) as part of the Livonian War between the forces of Ivan IV of Russia and the Livonian Confederation. It was the last battle fought by the German knights in Livonia and an important Russian victory. The knights were defeated so thoroughly that the Order reduced to only defending its fortresses, unable to fight in open battles.
Text from the Wikipedia article Battle of Ērģeme, licensed CC BY-SA 4.0.