Battle of Valle de Monterrey
1809 CE.
Shown on the map at 41.947°, -7.449°.
The Battle of the Monterrey Valley (6 – 7 March 1809) was fought during the Peninsular War outside Monterrei, Orense, in Spain. Resulting in a French victory, it took place in the early stages of Marshal Soult's Second French invasion of Portugal.
Text from the Wikipedia article Battle of the Monterrey Valley, licensed CC BY-SA 4.0.