It looks like one social media user has figured out a simple solution for world peace - and that's marrying off President Donald Trump's son, Barron Trump, 19, to Princess Isabella of Denmark, 18, in order to solve the Greenland row.

Over the past few months, Trump has been intent on buying Greenland, a self-governing territory within the Kingdom of Denmark.

It's caused a huge rift among lawmakers and the Danish government, as the White House has threatened to invade Greenland, including by way of a military operation.