Battle of Kuhmo
1940 CE.
Shown on the map at 64.848°, 29.326°.
The Battle of Kuhmo was a series of skirmishes, mainly between January 28 and March 13, 1940, near the town of Kuhmo during the Soviet-Finnish Winter War. The 54th Soviet Rifle Division was encircled, but was able to hold out until the end of the war.
Text from the Wikipedia article Battle of Kuhmo, licensed CC BY-SA 4.0.