Battle of Saintes
1351 CE.
Shown on the map at 45.746°, -0.633°.
The Battle of Saintes was fought on 1 April 1351 during the Hundred Years' War between French and English forces. The French were besieging the town of Saint-Jean-d'Angély when an English relief force arrived. The English force was victorious, but was unable to fulfill its mission, to resupply the besieged. The town fell to the French on 31 August.
Text from the Wikipedia article Battle of Saintes, licensed CC BY-SA 4.0.