US President Donald Trump Tuesday signed a security agreement with Danish Prime Minister Mette Frederiksen and Greenland Prime Minister Jens-Frederik Nielsen that will significantly expand the American military presence in Greenland, bringing months of tensions over the strategically important Arctic island closer to a resolution.
The trilateral agreement was signed on the sidelines of the UN General Assembly in New York and is aimed at strengthening security in the Arctic and North Atlantic. It allows the US to expand its existing military infrastructure in Greenland while reaffirming the sovereignty and territorial integrity of the Kingdom of Denmark and Greenlanders’ right to self-determination. The agreement will enter into force subject to the required national parliamentary procedures.
US presence to expand
Under the agreement, Washington will be able to modernise and expand its presence at the Pituffik Space Base and establish additional defence areas at Narsarsuaq and Mestersvig. The arrangement also seeks to prevent countries outside NATO from establishing a military presence in Greenland, reflecting growing Western concerns over strategic competition with Russia and China in the Arctic.
Trump described the agreement as beneficial to the US, Europe and Greenland. The pact marks a significant expansion of Washington’s military footprint on the island, where the US already operates Pituffik Space Base under longstanding defence arrangements with Denmark.
The agreement effectively updates the security framework that has governed the US military presence in Greenland for decades. The three governments have presented the new arrangement as a way to strengthen collective defence while giving Greenland a more direct role in decisions affecting its territory.
Greenland occupies a strategically important position between North America and Europe and has become increasingly important as melting Arctic ice opens new shipping routes and intensifies competition over security and natural resources.
Sovereignty remains with Denmark
The agreement follows months of diplomatic friction after Trump repeatedly expressed interest in acquiring Greenland and earlier declined to rule out economic or military pressure to secure greater American control over the island.
Denmark and Greenland strongly rejected any transfer of sovereignty, maintaining that Greenland was not for sale and that its future could be decided only by its people. The new agreement stops short of transferring sovereignty to Washington and instead establishes a broader framework for US military access and security cooperation.
Frederiksen said ahead of the signing that the agreement strengthened common security in the Arctic and North Atlantic while recognising the sovereignty and territorial integrity of the Danish kingdom and Greenland’s right to self-determination.
Nielsen said the arrangement recognised Greenland’s interests and its place in international cooperation, while strengthening security for Greenland, Denmark, the US and the wider Western alliance.
Arctic standoff eases
The deal could ease one of the most unusual disputes within NATO in recent years. Trump’s earlier statements about taking control of Greenland had strained relations with Copenhagen and generated opposition on the island, prompting months of negotiations among the three governments.
The new framework instead places the emphasis on expanded American military access and NATO security without changing Greenland’s political status.
Greenland is a semi-autonomous territory within the Kingdom of Denmark and exercises extensive control over its domestic affairs, while Copenhagen retains responsibility for areas including defence and foreign policy.
For Washington, Greenland’s location provides an important strategic position for missile warning, space surveillance and monitoring activity across the Arctic and North Atlantic. The agreement strengthens that role at a time when the Arctic has assumed growing importance in US and NATO security planning.