President Donald Trump continues to push for a U.S. takeover of Greenland.

It's a vast territory. Gracing the Arctic, much of it is frozen. It's sparsely populated. It holds vast natural resources.

In the aftermath of WWII, American efforts to acquire the island ramped up, including a proposed swap that included oil-rich ...

Russia lost a war in Crimea in the 1850s, leaving the country deep in debt. To ease that burden, Russia cut a real estate deal with the U.S. government, selling its colony of Alaska to the Americans.