Thursday morning brought a sense of relief but also lingering anxiety across Europe, with unanswered questions about what Trump's new Greenland deal might entail.

In a hypothetical nuclear war involving Russia, China and the United States, the island of Greenland would be in the middle of Armageddon. The strategic importance of the Arctic territory — under the flight paths that nuclear-armed missiles from China and Russia could take on their way to incinerating targets in the United States,

During a speech Wednesday at the World Economic Forum in Davos, Switzerland, President Trump said that he would not use force to take Greenland, an island the State Department says the United States needs to control to counter threats in the surrounding Arctic sea by Russia and China.

"All the United States is asking for is a place called Greenland, where we already had it as a trustee, but respectfully returned it back to Denmark not long ago," Trump said.

The U.S. military announced aircraft would soon arrive at Pituffik Space Base in Greenland, while stressing it is part of a "long-planned" exercise.

Follow live coverage from NBC News as President Donald Trump launches his Board of Peace at Davos and Denmark, Greenland respond to the framework deal with NATO to cancel tariffs.

The president continues to assert that the U.S. acquiring Greenland is imperative for national and international security.

President Trump has exaggerated threats to Greenland from Russia and China and downplayed the country's current defenses, according to local officials and experts on the Arctic.

President Donald Trump dropped his threat to impose tariffs on eight European countries as part of his push to acquire Greenland. Yesterday's reversal came hours after the European Union’s parliament halted final approval of a critical trade deal that Trump reached with the bloc last summer.