President Donald Trump signed a trilateral security agreement with Denmark and Greenland on the sidelines of the U.N. General Assembly in New York, locking in a permanent and expanded American military footprint across the mineral-rich Arctic territory. The deal, which carries no end date, allows the United States to modernize its existing installation at Pituffik Space Base, establish new defense areas at two additional sites, and bar any adversary nation from placing military assets on Greenlandic soil without Washington’s written consent.
In remarks to the General Assembly ahead of the signing, Trump announced the U.S. would “immediately begin the process of developing a large military presence in the appropriate locations,” including “building two very major military bases.”
The agreement marks a dramatic turn from months of tension over Trump’s stated desire to bring Greenland under American control, and it delivers, on paper, much of what the president sought without the diplomatic rupture his critics predicted.
The accord, released jointly by all three governments after the signing ceremony, grants Washington sweeping operational latitude. The U.S. may “modernize and expand” its activities at Pituffik, the remote northwest Greenland base that currently hosts roughly 200 American soldiers and supports missile warning, missile defense, and space surveillance for both the U.S. and NATO. That presence is a fraction of what it once was: since 1945, the American military footprint in Greenland has shrunk from thousands of troops spread across 17 bases and installations to a single outpost.
Under the new pact, the U.S. can establish “defense areas” at Narsarsuaq in southern Greenland and Mestersvig in the east. It may also set up additional defense areas and strengthen military operations or facilities beyond those named sites. The agreement provides for broad military mobility across Greenlandic territory, including “undersea access.”
No non-NATO country may establish “its own manned or unmanned military installations in Greenland” or maintain a “persistent” military presence unless all signatories agree otherwise. Fox News reported that the pact expands on a 1951 defense agreement by allowing the U.S. to establish additional military installations without requiring separate Danish or Greenlandic approval, a significant upgrade in operational flexibility.
And there is a clause aimed squarely at the future. If Greenland chooses independence, it must remain in NATO and assume Denmark’s rights and obligations under the deal. The agreement would survive any change in Greenland’s political status.
Secretary of State Marco Rubio called the agreement “a huge win for the United States and the American people,” telling reporters it comes at “zero cost to the U.S. taxpayer”, meaning no payment was made to Denmark or Greenland in exchange for the expanded rights. Trump himself described the arrangement as giving America “permanent control over security, and all other needs, in Greenland.”
That framing matters. Critics spent months warning that Trump’s Greenland rhetoric would fracture the Atlantic alliance and alienate a key NATO partner. Danish Prime Minister Mette Frederiksen had previously cautioned that a U.S. takeover would amount to the end of the alliance. Yet on Tuesday, Frederiksen stood beside Trump and called the pact a “deal that can last forever,” adding that it was good for the U.S., Greenland, Denmark, and the broader NATO alliance.
“Mr. President, you have been very clear: You don’t want adversaries to come too close. I fully agree.”
That was Frederiksen, not a Trump surrogate, speaking at the signing. The distance between her January warnings and her Tuesday praise tells its own story about the leverage Trump’s approach created.
Greenland’s Prime Minister Jens-Frederik Nielsen called the accord “a win-win-win agreement” and addressed Trump directly: “Your security is our security, and our security is your security.” NATO Secretary-General Mark Rutte, who reportedly helped ease tensions at the height of the standoff in January, celebrated the signing on X, writing that “this agreement, along with NATO’s growing role in securing this vital region, enhances our collective security and supports a safer and more stable future for us all.”
Trump first floated the idea of acquiring Greenland in 2019, drawing widespread ridicule from the foreign-policy establishment. During his second term, he escalated the rhetoric, insisting the U.S. needed to “take Greenland” to prevent Russia or China from doing the same. “One way or the other, we’re going to have Greenland,” he said at the time.
The bluntness rattled European capitals. EU partners stepped up security exercises and monetary support for Greenland amid the standoff. Denmark’s parliament approved a bill last year to allow U.S. military bases on Danish soil, widening a 2023 agreement reached under the Biden administration that had given U.S. troops broad access to air bases in Denmark. The diplomatic groundwork, in other words, was already being laid, but it took Trump’s willingness to press the issue publicly to force the final agreement across the finish line.
The administration’s broader posture on national security has followed a similar pattern, applying direct pressure first, then converting leverage into binding policy.
National Review’s editors acknowledged the deal as a strategic win, noting that Greenland contains potentially valuable mineral resources including rare earths and that its Arctic location makes it strategically critical for U.S. defense. The publication observed that under the agreement, “no U.S. adversary could have a base or military presence there without Washington’s written approval.”
Not everyone on the island experienced the past months as a triumph of dealmaking. Naaja Nathanielsen, one of Greenland’s two lawmakers in the Danish parliament and a former government minister in Nuuk, told the Associated Press that the period tested the population deeply.
“A lot of trust has been tested, I would say. It’s been really difficult in Greenland and people have been generally afraid and worried about everything, from losing our country, to our livelihoods and so on.”
Still, Nathanielsen praised the final product as “a huge step in the right direction,” calling it the first binding agreement Greenland has signed as a country. “For us, that is a huge step forward in our quest for more self autonomy and a bigger seat at the table,” she said.
That distinction, Greenland signing as a sovereign party, not merely as a Danish dependency, carries weight for an island of roughly 56,000 people, about two-thirds of whose territory sits inside the Arctic Circle. The agreement’s independence clause, requiring Greenland to stay in NATO and honor the deal’s terms even after a potential break from Denmark, suggests all three parties took the possibility of eventual statehood seriously enough to plan for it.
Trump’s approach to securing permanent military rights in Greenland drew skepticism from allies and adversaries alike. The signed agreement is the answer to that skepticism.
Melting Arctic sea ice has opened additional shipping routes and intensified competition among major powers for access to the region. Greenland sits at the crossroads of that competition. Pituffik Space Base already plays a role in missile defense and space surveillance for both the U.S. and NATO, but the existing footprint, 200 soldiers on one base, was a shadow of the Cold War presence that once spanned 17 installations.
The new agreement reverses that decades-long drawdown. Two named defense areas at Narsarsuaq and Mestersvig, plus the option to establish additional sites, give the Pentagon a broader geographic spread across the island. The undersea access provision opens a dimension of operations that goes well beyond base construction.
And the non-NATO exclusion clause directly addresses the concern Trump voiced from the start: that Russia or China could establish a foothold on the island if the U.S. did not act. Under this deal, that door is shut unless all three signatories agree to open it.
The contract provision, requiring Washington to award base-related goods and services “to Greenlandic sources to the maximum extent possible”, builds in an economic incentive for the local population, tying Greenland’s prosperity to the American military presence rather than leaving it as an abstract security arrangement imposed from abroad.
The administration has paired this kind of strategic assertiveness with domestic policy wins on multiple fronts. Recent enforcement actions on immigration reflect the same willingness to use available leverage rather than wait for consensus to form on its own.
Trump did not respond to questions about whether U.S. acquisition of Greenland is off the table. That silence is deliberate. The agreement gives the United States nearly everything it would gain from ownership, permanent military access, veto power over adversary presence, operational mobility, and a contractual lock that survives Greenlandic independence, without the diplomatic cost of formal annexation.
Whether that satisfies Trump long-term is an open question. So is the timeline for actual base construction, the scope of the “two very major military bases” he announced, and the full text of the agreement beyond the excerpts released so far.
But the direction is clear. A deal that critics said could never happen, and that would wreck the Atlantic alliance if it did, is now signed, sealed, and permanent. Denmark’s prime minister endorsed it. Greenland’s prime minister celebrated it. NATO’s secretary-general praised it. And the United States holds the strategic position it lacked a year ago.
The foreign-policy establishment spent years insisting that Trump’s Greenland talk was reckless bluster. The ink on the agreement says otherwise.
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