Battle of Le Mans
1793 CE.
Shown on the map at 48.004°, 0.197°.
The Battle of Le Mans was a combat in December 1793 in the Virée de Galerne, an operation of the War in the Vendée during the French Revolution. It resulted in the rout of the Vendéen forces by Republican troops.
Text from the Wikipedia article Battle of Le Mans (1793), licensed CC BY-SA 4.0.