Former French Prime Minister Dominique de Villepin stated that any U.S. attack on Greenland would cross a red line for Europe. This comes after the White House declared that President Donald Donald Trump does not rule out the possibility of using force to seize this semi-autonomous Danish territory.He added that any act of aggression by the U.S. would be “unprecedented,” as it would amount to the most powerful nation within NATO attacking another member of the military alliance. Danish Prime Minister Mette Frederiksen said earlier this week that if Donald Trump were to attack Greenland, it would spell the end of NATO. Donald Trump has long argued that the United States must control Greenland to ensure its own security.