Battle of Suomussalmi
1939 CE.
Shown on the map at 64.888°, 28.889°.
The Battle of Suomussalmi was fought between Finnish and Soviet forces in the Winter War. The action took place from 30 November 1939 to 8 January 1940. The outcome was a Finnish victory against superior forces. The battle is considered the war's clearest, most important, and most significant Finnish victory in the northern half of Finland.
Text from the Wikipedia article Battle of Suomussalmi, licensed CC BY-SA 4.0.