Battle of Pierres Noires
1944 CE.
Shown on the map at 48.212°, -4.915°.
The Battle of Pierres Noires was a naval action that occurred during the Allied Operation Dredger, involving several Royal Canadian Navy (RCN) destroyers and a German Kriegsmarine U-boat with surface escorts near Brest, France. The RCN force managed to sink or damage some of the escorts but the U-boat was able to escape.
Text from the Wikipedia article Battle of Pierres Noires, licensed CC BY-SA 4.0.