US, Denmark, Greenland sign Arctic security deal, ending months of tensions

The three leaders stood together at the United Nations in New York on Tuesday afternoon and signed a document that had seemed, just months earlier, impossible to imagine. The United States, Denmark, and Greenland had reached an agreement on Arctic security—one that granted Washington expanded military presence in Greenland while explicitly protecting the island's sovereignty and its people's right to self-determination. It was, by design, a deal that gave something to each party and asked each to accept what the others needed most.

The path to this moment had been bruising. For eighteen months, Greenlanders had endured what many experienced as a campaign of pressure from the American president, who had openly discussed acquiring or controlling the territory. The uncertainty had left the population fractured. Some saw opportunity in closer security ties with the United States. Others felt threatened by the rhetoric and the attention. Many simply wanted clarity about what was actually being negotiated and what it would mean for their future. "There have been many different reactions in Greenland because they are talking about a deal but no one can see the deal, we don't know what it is all about," one observer noted before the signing. "Many people feel no trust at all."

The agreement itself was specific and expansive in its military provisions. The United States would modernize and expand its activities at Pituffik Space Base, a facility that Vice President JD Vance had visited the previous year. Washington would also establish military bases at Narsarsuaq—where the Americans had maintained a presence in the 1950s—and at Mestersvig. Beyond these named locations, the text permitted the United States to establish additional defense areas throughout Greenland and to strengthen its military operations and facilities as needed. American aircraft gained the right to fly over and land anywhere in Greenlandic territory, including territorial waters. The two countries also agreed to review requests for unmanned military installations outside designated defense areas using accelerated approval procedures.

But the agreement was equally explicit about what would not be permitted. No state outside NATO could establish manned or unmanned military installations in Greenland or maintain a persistent military presence there without the parties' consent. Any investment from non-NATO countries or their partners would be prohibited from gaining control, significant influence, or access to non-public information that might threaten national security or public order. The language was clearly aimed at China and Russia. The deal also included provisions for countering espionage and working together on security threats.

What made the agreement politically workable was its careful protection of Danish and Greenlandic sovereignty. The text explicitly reaffirmed "the sovereignty and territorial integrity of the Kingdom of Denmark" and recognized that "the People of Greenland constitute a people pursuant to international law with the right to self-determination." These were not ceremonial phrases. They were the price of Greenland's and Denmark's agreement, and they were stated with pointed emphasis by both leaders as they spoke.

The agreement contained no expiration date, and it addressed a scenario that seemed distant but was clearly on the minds of the negotiators: Greenlandic independence. Should Greenland become independent in the future, the text stipulated that the country would need to "agree to remain in NATO" and continue all arrangements agreed to in the treaty. It was a way of saying that strategic commitments to the Arctic would outlast any change in political status.

Denmark's foreign minister, Lars Løkke Rasmussen, acknowledged the difficulty of the process. "It has been a bumpy ride," he said, standing alongside his American and Greenlandic counterparts. "But here we are—with a deal in hand that we can all be very satisfied with." Greenland's Prime Minister Múte B. Egede emphasized that the agreement "builds on 85 years of security cooperation" since the Second World War and stressed that it was "an agreement with us," not merely about Greenland. "This is not only an agreement about us, but an agreement with us," he said. "It takes into account the people of Greenland, our rights, our livelihoods and the development of our country."

Trump, for his part, called it "an unprecedented agreement" and praised the relationship with both leaders. NATO Secretary General Mark Rutte, who had played a behind-the-scenes role in bringing the parties together during the height of the crisis in January, issued a statement welcoming the deal as essential for Arctic security. Germany's Chancellor Friedrich Merz, absent from New York as he managed domestic crises, called it "good news for the security of Greenland" and said it "strengthens our partnership in NATO." The European Council's António Costa offered similar praise, calling it "a positive step for transatlantic cooperation and Arctic security, grounded in respect for sovereignty, territorial integrity and the right of the Greenlandic people to self-determination."

The signing brought closure to a chapter that had threatened to divide NATO allies and expose fractures in the Western alliance. All three leaders got what they needed: the United States secured expanded military infrastructure in a strategically vital region; Denmark and Greenland preserved their sovereignty and self-determination; and NATO reinforced its presence in the Arctic at a moment when Russia and China were both asserting themselves in the region. The agreement had no end date. Whatever challenges lay ahead, this one, at least, had been resolved.