United States, Denmark and Greenland Sign the 1951 Defence Agreement's Amendment — New Defence Areas at Narsarsuaq and Mestersvig

Between the two articles that carry the headlines sit the operative ones. Article V gives American requests for unmanned installations outside the defence areas an accelerated approval procedure. Article VI grants US public vessels, aircraft, forces and vehicles free access to and movement between the defence areas through Greenland and its territorial sea, overflight and landing anywhere on the island, and undersea access, exercised with the greatest possible respect for the Greenlandic way of life and reviewed regularly by the Permanent Committee. Article VII has the parties cooperate on the security of the areas and against espionage, with the United States entitled to raise concerns about any construction nearby. Contracts for building and servicing the areas go to Greenlandic sources to the maximum extent possible. The preamble names US military access "including through establishment of a Golden Dome defense system" as a shared interest; no article says what that places where. Narsarsuaq in the south was the wartime Bluie West One airfield; Mestersvig on the east coast is an Arctic Command station used by the Sirius patrol. Pituffik holds about 150 American service personnel, by the Danish defence's estimate of September 2025.

Trump said the agreement gives the United States "permanent control over security" in Greenland. Frederiksen said its premise is that all three signatories are in NATO and that it would no longer apply if the United States withdrew from the alliance. Lars Løkke Rasmussen said the Americans finance any bases they build and that the further terms for the two new areas remain to be agreed. Nielsen called it a win-win-win agreement that should put to rest any doubt about where Greenland's loyalty lies. Mark Rutte welcomed it on X. The 2026 text carries no withdrawal clause of its own; the premise Frederiksen states rests on the 1951 agreement, which the amendment leaves in force and which was concluded under the North Atlantic Treaty.

The alliance is written into an agreement to which it is not a party, twice: Article IX makes NATO membership the qualification for any foreign military presence, and Article XI has Copenhagen and Nuuk undertake that an independent Greenland will join, where Article 10 of the North Atlantic Treaty makes admission a unanimous invitation by every member. The government that signed on Tuesday is the one that ran Arctic Endurance from January, the deployment across Greenland with France, Germany and the Nordic states that DR later established had been a contingency against an American seizure of the island. Defence areas and US access were already in the 1951 text; what is new is the expedited procedure for unmanned installations, the third-state bar, the investment screen and the absence of a term. Not in the text: a US personnel figure for the new areas, a date for the parliamentary procedures in Copenhagen and Nuuk on which entry into force waits, and any statement from Berlin. Signal No. 151 carries the article-by-article reading of the Danish text on the day of signing.