I don't think you have the background to understand the nuance of the occupation of Denmark. Germany controlled foreign policy, but domestic policy was much more of a give and take until 1944 or so. Denmark had their own elections and a head of state was an anti Nazi before the invasion for a few years. Several neutral countries like Switzerland and Portugal recognize the Danish government and copenhagen. The control wasn't nearly as tight as France for example.
The British agreed with the US occupation of Greenland eventually but initially there was a plan for British and Canadian occupation that the United States firmly rejected. And that goes along with FDR's anti-colonialism stance. Britain was the US's closest Ally but the US, and especially FDR, was not a fan of Britain's colonial policies. And it had the largest colonial empire ever at the time.
Before the war, Greenland was a tightly controlled colony of Denmark, otherwise closed off to the world. After the Invasion of Denmark on 9 April 1940, Greenland was left on her own, because the Royal Navy seized any ships arriving from Axis-controlled Europe. Britain and Canada initially laid...
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