On 9 April 1940, the day that Denmark fell to the Nazi war machine, the Danish envoy to the United States, Henrik Kauffmann, in violation of his diplomatic status, signed an agreement authorising the US to act as defenders of Greenland and build military installations there.

Analysts say the Cold War agreement allows the president to increase the American military presence almost at will.

President Donald Trump's renewed interest in Greenland comes days after the U.S. arrest and extraction of Venezuela's Nicolás Maduro.

Donald Trump has never ruled out a military invasion of Greenland, but he could take over the Danish Arctic island without firing a shot.

Danish Prime Minister Mette Frederiksen has warned that the U.S takeover of Greenland would mean an end to the alliance.

Trump doesn’t need to annex Greenland to achieve his goals. But after Venezuela, he revived his threats to seize it, possibly via military force.

Greenland's strategic location above the Arctic Circle makes it a focal point in global security and trade debates

At face value, if President Trump is determined to secure Greenland, the military option is probably the least risky option. But in attacking a fellow NATO member it would almost certainly mark the en