Why was Greenland at war with Germany? Because of Denmark?
Had to look it up. Careful, it's Wikipedia. https://en.wikipedia.org/wiki/Greenland_in_World_War_II
From Metapedia (Translated from German):
After the First World War, the Kingdom of Norway tried to claim ownership of the island, but gave up its claims in 1933 following an arbitration ruling by the International Court of Justice in The Hague.
After Denmark was occupied by the Wehrmacht in 1940, Greenland, like Iceland, was later used as a base by the Americans. Since then, the US military airbase “Thule Air Base” has been located on the island, from where the Americans monitor the air and space, as does Russia, whose west coast is not too far away.