Battle of Saucourt-en-Vimeu
881 CE.
Shown on the map at 50.082°, 1.599°.
The Battle of Saucourt was part of the Viking invasions of West Francia and occurred between forces of Vikings and the troops of Kings of West Francia, Louis III of France and his brother Carloman II, on 3 August 881 at Saucourt-en-Vimeu.
Text from the Wikipedia article Battle of Saucourt-en-Vimeu, licensed CC BY-SA 4.0.