Operation Silver Fox in the farthest northern reaches of continental Europe had a direct impact on the war in the Eastern Front.

Map 1: Finland from 1920 to 1938

Map 2: The Winter War, 1939-1940

Map 3: Areas Finland ceded to the USSR after the Winter War

Sources: 

Operation Silver Fox: The History of Nazi Germany's Arctic Invasion of the Soviet Union During World War II

Operation Barbarossa and Germany's Defeat in the East, by David Stahel. Cambridge University Press, Cambridge, UK, 2009.