In 1865, in the wake of the Civil War, the U.S. began looking to expand its influence on the world stage. This happened at precisely the moment when Russia, having just lost the Crimean War, was seeking to counterbalance British power in the Pacific. This proved to be the perfect recipe for American expansion in the Arctic.

The story goes that Trump and Frederiksen spoke on the phone last week for about 45 minutes in what was expected to be a bit of a feeling-out between the two parties, given Trump’s very public declaration that he would like to take Greenland off Denmark’s hands.