Royan pocket
1944 CE.
Shown on the map at 45.698°, -1.243°.
The Royan pocket (French: Poche de Royan) was one of the Atlantic pockets towards the end of World War II, an isolated position held by German troops left behind as the German army retreated from occupied France. It became important to the German High Command that these pockets be held to deny port facilities to the advancing Allies.
Text from the Wikipedia article Royan pocket, licensed CC BY-SA 4.0.