For over a year, Greenland sat at the centre of a tense debate about who should control it. That debate now has a formal answer. On September 22, 2026, the United States, Denmark and Greenland signed a defence agreement in New York that expands America’s military presence on the island while keeping it under Danish sovereignty (White House). Here is what the deal covers. Nobody bought Greenland. They just agreed on who gets the spare keys.
An Update, Not a New Treaty
The agreement amends the 1951 defence pact between the US and Denmark, along with the deals that followed it (White House). It was signed in English, Danish and Greenlandic, with the English version prevailing in any dispute (White House).
Sovereignty Stays Where It Was
The deal reaffirms Denmark’s sovereignty and territorial integrity. It also recognises the people of Greenland as having the right to self-determination under international law (White House). After months of talk about acquiring the island, no territory changes hands.
Two New Defence Areas
The US may establish an additional defence area at Narsarsuaq and Mestersvig (White House). The finer details, however, must be mutually agreed by all three parties. So the permission is real, but it comes with a group sign-off.
Pituffik Gets an Upgrade
America already operates Pituffik Space Base in Greenland. The new deal allows it to modernise and expand its activities there (White House). Think of it as renovating a house you already live in, rather than buying a new one.
A Clear Process for Future Bases
Any party can propose a new defence area, stating its location, size and activities. Talks begin at a Permanent Committee. If there is no agreement within 90 days, discussions move to deputy ministers, then ministers (White House).
Wide Access by Air and Sea
US aircraft may fly over and land anywhere in Greenland, and US vessels may have undersea access to its waters, unless the parties agree otherwise (White House). These rights must respect local hunting, fishing and traditional life (White House).
Non-NATO Countries Stay Out
No country outside NATO may build military installations or keep a persistent military presence in Greenland (White House). Investors from outside NATO, its partners or the EU also cannot control sensitive sectors such as critical infrastructure and resource extraction (White House).
Local Businesses Come First
Contracts to build, maintain and service the defence areas must go to Greenlandic businesses to the maximum extent possible (White House). A military neighbour is far easier to welcome when it also brings steady work to local firms. Security is easier to host when it pays rent.
Independence Comes With Conditions
If Greenland becomes independent, Denmark and Greenland must ensure the new state stays in NATO and takes on Denmark’s obligations under this agreement (White House). Greenland can leave the Kingdom one day. The security arrangement leaves with it.
Permanent, Pending Parliament
The agreement has no end date and can only be changed by mutual consent (White House). It takes effect once Denmark and Greenland complete their parliamentary procedures (White House). After a year of friction, the outcome is telling. The surest way to secure an island was to stop trying to own it.
