The smallest US state, Rhode Island (1,212 square miles), has a larger population than the largest US state, Alaska (663,300 square miles), with 1.055 million residents vs. 736,732.
There are around 2.2 million saunas in Finland, 1 for every 2.5 people.
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The US knew this and had deviced a counter: Nuking all Danish straits until it was impossible to sail through them.
In case of WW3, Denmark would not only have ceased to exists as a country and a people, it would have ceased to exist as a geographical features.