As many of us know, the US attempted to purchase Greenland from Denmark in 1946 for $100 million. The Danes refused, for reasons that, AFAIK, are largely unknown.
Would it be plausible to have a TL where the Americans successfully purchase Greenland from the Danes in the mid-to-late 1940s with a POD not long before that? Would there have to be far-reaching butterflies for this to be plausible? And would simply offering more money have been enough to convince the Danes?