US, Denmark and Greenland say they will sign an Arctic security pact next week

President Donald Trump said on 18 September that the United States, Denmark and Greenland had reached an agreement giving Washington “permanent control over security, and all other needs,” in the Arctic territory. Danish and Greenlandic leaders confirmed that a pact is due to be signed next week at the United Nations General Assembly in New York. They also said the deal stops short of the acquisition Trump has demanded for years.

No text has been published. The gap between Trump’s language and the statements from Copenhagen and Nuuk is the story that now matters. One side describes an “Infinite Life” arrangement at “no cost” to the United States. The other side stresses sovereignty, territorial integrity and the right of Greenlanders to decide their own political future.

What Trump said the pact does

In a Truth Social post on Friday, Trump wrote that no US adversary would be allowed a base, a military presence, or “sensitive investments” in Greenland without express written approval from Washington. He said the United States would “immediately begin the process of developing a large Military presence in the appropriate part of Greenland.” He also said the United States would “FOREVER have the complete ability to do what is necessary” to defend the island and the United States.

Secretary of State Marco Rubio called the arrangement a “historic deal” and a “huge win.” A US official, speaking to American outlets after the announcement, said the draft includes permanent access, basing and overflight rights, and that it is designed to keep China and Russia, as non-NATO states, from placing troops or bases on the island. The official added that the text is meant to give Washington tools to block investment in sensitive sectors.

The United States already operates Pituffik Space Base, formerly Thule Air Base, in northwest Greenland. The 1951 Defence Agreement with Denmark already gives Washington wide latitude to use Greenlandic territory for NATO defence. The new language, if it matches the official’s description, would write a veto over third-country military and investment activity into a political instrument that Trump can sell as a personal victory.

What Copenhagen and Nuuk actually confirmed

Prime Minister Mette Frederiksen said the agreement “strengthens our common security in the Arctic and the North Atlantic area” and “at the same time recognizes the sovereignty and territorial integrity of the Kingdom and the right of the Greenlandic people to self-determination.” Greenland’s premier, Jens-Frederik Nielsen, said the pact “ensures and strengthens the security of Greenland, the Kingdom of Denmark, the United States and the Western alliance.”

Both statements were issued after Trump’s post. Neither adopted his phrase “permanent control.” Reuters had reported earlier on Friday that talks were closing on a larger US military presence that would fall well short of a transfer of the island. Foreign Minister Lars Løkke Rasmussen had already called US ownership a red line.

Greenland is a self-governing territory inside the Kingdom of Denmark. It runs its own domestic affairs. Defence and foreign policy remain with Copenhagen. About 57,000 people live on the island. Most political parties in Nuuk have rejected sale or annexation. They have also courted investment in minerals, ports and research, including from partners other than the United States. That is the tension the new text will have to resolve in writing.

Why the wording will be tested quickly

The Arctic has become a theatre for radar, missile warning, undersea cables, rare earths and shipping routes that open as sea ice recedes. China has sought research stations, mining stakes and port projects across the High North. Russia has rebuilt bases along its own Arctic coast. Trump’s earlier talk of taking Greenland by force opened a rift inside NATO. A signed pact that keeps Danish title intact while expanding US basing is the compromise both sides now need.

The test is specific. If the document gives Washington a veto over “sensitive investments,” someone will have to define that term. A Chinese stake in a rare-earth project, a research station with dual-use sensors, or a port upgrade financed from Beijing would all sit in the grey zone. If the document only restates existing NATO rights, Trump’s claim of permanent control will look thinner once the annexes are read.

Signing is scheduled on the margins of next week’s UN gathering. Until the pages are public, the deal exists as three overlapping descriptions: a US victory speech, a Danish assurance of sovereignty, and a Greenlandic claim that self-determination survives. Those three sentences can be made to fit. They can also come apart the first time a third country files an investment notice in Nuuk.