Battle of the Baztan Valley
1794 CE.
Shown on the map at 43.147°, -1.517°.
The Battle of the Baztan Valley was fought between 23 July and 1 August 1794 during the War of the Pyrenees, between a French force from the Army of the Western Pyrenees commanded by Bon-Adrien Jeannot de Moncey and the Spanish forces led by Ventura Caro. The French army drove the Spanish from their defenses, then followed the valley northward down to the Atlantic coast. The Spanish forces holding the coastal defenses were compelled to surrender or flee.
Text from the Wikipedia article Battle of the Baztan Valley, licensed CC BY-SA 4.0.