Battle of Yevenes
1809 CE.
Shown on the map at 39.567°, -3.883°.
The Battle of Los Yébenes (24 March 1809) was a conflict between the Regiment of Polish Lancers (Legion of the Vistula) and multiple regiments of Spanish cavalry, near the Spanish village of Los Yébenes (today, a municipality). The heavily outnumbered Polish regiment, led by Colonel Jan Konopka, was surprised and nearly defeated by the larger Spanish force.
Text from the Wikipedia article Battle of Los Yébenes, licensed CC BY-SA 4.0.