President Donald Trump has vowed to follow through on his threat “100%” to impose tariffs on European countries that oppose his demands for control of Greenland.

European allies rallied around Greenland’s sovereignty. Denmark’s foreign minister stressed that the US president cannot threaten Denmark’s ownership of the semi-autonomous territory.

British Foreign Secretary Yvette Cooper reiterated Britain’s position that Greenland’s future is up to “Greenlanders and Danes alone” to decide.

On Monday, President Trump did not rule out the possibility of using force, instead insisting that he would enforce threatened tariffs on products arriving in the United States from the United Kingdom and seven other North Atlantic Treaty Organization (NATO) allies.

Asked by NBC News if he intended to use force to occupy Greenland, President Trump replied, “No comment.”

The US president said Britain would impose a 10% tariff on “all goods” sent to the US from February 1st, rising to 25% from June 1st, until an agreement is reached for the US to buy Greenland from Denmark.

Trump said the same applies to Denmark, Norway, Sweden, France, Germany, the Netherlands and Finland, all members of NATO, the defense alliance founded in 1949.

Asked if he would follow through on his tariff threat, Trump told NBC News: “100 percent.”

President Trump added: “Europe should be focused on the war with Russia and Ukraine because, frankly, we see what that has done to them… That’s where Europe should be focused, not Greenland.”

Denmark warned that US military action in Greenland would mean the end of NATO. In recent days, Greenland has received support from the European member states of the alliance, some of which sent small numbers of troops to Greenland in a symbolic move last week.

However, President Trump followed this development by announcing tariffs on eight NATO allies.

Denmark’s Foreign Minister Lars Lokke Rasmussen said Europe needed to show President Trump’s tariff threats were “not the way to go.”

“There is an insurmountable line that we cannot cross,” he told Sky News. “We cannot threaten the ownership of Greenland. I have no intention of escalating this situation.”

NATO Secretary-General Mark Rutte said the alliance would continue to work with Denmark and Greenland on Arctic security.

The European Union will hold a summit in Brussels on Thursday to discuss how to respond to President Trump’s latest threat to take over Greenland.

EU foreign policy chief Kaja Kalas said the EU had “no interest in starting a fight, but we will stand by our position.”

“But trade threats are not the way to solve this,” Karas added. “Sovereignty is not for trade.”

This comes amid the release of a text exchange between President Trump and the Norwegian Prime Minister. US president blames Norway for not winning Nobel Peace Prize.

In his response, seen by the BBC, Jonas Gare Store explained that the award was given to Venezuelan opposition leader María Colina Machado last October by an independent committee, not by the Norwegian government.

“Norway’s position on Greenland is clear: Greenland is part of the Kingdom of Denmark and Norway fully supports the Kingdom of Denmark on this issue,” Store added.

Trump also referred to the text message exchange in an interview Monday, saying it was “completely controlled by Norway.” [the Nobel Prize] No matter what they say.

“They like to say they have nothing to do with it, but they have everything to do with it.”

Meanwhile, the North American Aerospace Defense Command (Norad) announced on Monday that multiple aircraft were heading to Pitafik Space Station in Greenland.

The U.S.-Canadian Joint Military Defense Organization said it was coordinating with Denmark and had been briefed on the Greenlandic government, stressing that the attack was part of routine operations “in support of various long-planned Norad operations.”

Similar Norad operations at the base took place in 2022, 2023, and last year.