Battle of Bielsa pocket
1939 CE.
Shown on the map at 42.634°, 0.218°.
The Battle of Bielsa pocket took place between 14 April and 15 June 1938, during the Spanish Civil War. After the fall of the Aragon front, a Republican division, in April 1938, was surrounded by the Nationalists in the Cinca River Valley. The division, despite being heavily outnumbered, managed to hold until 6 July and then crossed the French frontier.
Text from the Wikipedia article Battle of Bielsa pocket, licensed CC BY-SA 4.0.