Did you know the United States once tried to buy Greenland? From Wiki
Following World War II, the United States developed a geopolitical interest in Greenland, and in 1946 the United States offered to buy Greenland from Denmark for $100,000,000, but Denmark refused to sell. However, in 1950, Denmark did agree to allow the United States to reestablish Thule Air Base, which was greatly expanded between 1951 and 1953 as part of a unified NATO Cold War defense strategy.
Following World War II, the United States developed a geopolitical interest in Greenland, and in 1946 the United States offered to buy Greenland from Denmark for $100,000,000, but Denmark refused to sell. However, in 1950, Denmark did agree to allow the United States to reestablish Thule Air Base, which was greatly expanded between 1951 and 1953 as part of a unified NATO Cold War defense strategy.