Washington/Copenhagen, September 20, 2026: A new security arrangement involving the United States, Denmark and Greenland is set to reshape the military landscape of the strategically important Arctic territory, with Washington seeking expanded access and a larger defence presence while Copenhagen and Nuuk say Greenland’s sovereignty will remain protected.
US President Donald Trump announced the agreement on September 18, describing it as providing the United States with permanent control over Greenland’s security and allowing Washington to address what it considers long-term strategic concerns in the Arctic.
However, the agreement has not yet entered into force. Denmark’s government said the three parties are expected to sign the pact during the United Nations General Assembly next week, after which it will have to undergo the required parliamentary procedures.
US Plans Expanded Military Presence
According to statements from the Trump administration, the proposed arrangement would give the United States continuing military access to Greenland, including rights related to bases and overflights. US officials have also indicated that Washington could increase its military facilities on the island when required.
Trump said the United States would begin planning for a larger military presence in Greenland and work with local authorities on its development.
The precise number of additional troops, locations of potential facilities and the timetable for construction have not been publicly disclosed.
US Secretary of State Marco Rubio said the agreement would keep Greenland within the strategic defence framework of North America and prevent rival powers from establishing a military foothold in the territory.
Russia and China Targeted by Security Restrictions
A central element of the proposed arrangement is the restriction of military activity by countries outside the NATO alliance.
US officials have said adversaries such as Russia and China would not be permitted to establish military bases or deploy troops in Greenland. The proposed framework would also place restrictions on sensitive investments by countries considered security concerns for the United States.
These provisions reflect the growing strategic importance of Greenland, which sits between North America and Europe and occupies a key position for monitoring activity across the Arctic and North Atlantic.
Denmark and Greenland Stress Sovereignty
While Trump has described the arrangement in terms of permanent US security authority, Danish and Greenlandic leaders have emphasized that the agreement does not transfer sovereignty over the territory to Washington.
Danish Prime Minister Mette Frederiksen said the proposed agreement recognizes the sovereignty and territorial integrity of the Kingdom of Denmark, as well as the Greenlandic people’s right to self-determination. Greenland’s Prime Minister Jens-Frederik Nielsen similarly said the arrangement recognizes Greenland’s interests and its role in international cooperation.
Reuters reported on September 19 that Denmark and Greenland had reiterated that the planned agreement would not compromise Greenland’s sovereignty.
The distinction is significant because Greenland is an autonomous territory within the Kingdom of Denmark and has its own government, while questions over its future independence remain an important part of the political debate.
Existing US Military Presence in Greenland
The United States already has a long-standing defence relationship with Greenland.
Washington and Copenhagen established a formal defence framework in 1951, and subsequent arrangements have governed the US military presence on the island. Greenland is also home to Pituffik Space Base, a strategically important US installation involved in missile warning, missile defence and space surveillance.
The new arrangement would build on that existing military relationship rather than create the US presence in Greenland from scratch.
Agreement Comes After Months of Tension
The announcement follows a period of heightened diplomatic tension surrounding Trump’s longstanding interest in Greenland.
The US president has repeatedly argued that Greenland’s location makes it important to American national security and has previously discussed acquiring the territory. Denmark and Greenland, however, have maintained that Greenland is not available for sale and have emphasized their sovereignty and right to determine the territory’s future.
The latest agreement represents a shift toward a formal security arrangement focused on military cooperation and Arctic defence rather than a transfer of territorial ownership.
What Happens Next?
The next major step is expected to be the signing of the agreement during the UN General Assembly. The pact will then need to pass the necessary parliamentary procedures before it can take effect.
Important details remain unavailable, including the complete text of the agreement, the exact scope of future US military expansion and how any new infrastructure would be financed.
For now, the proposed pact establishes a framework for closer US-Danish-Greenlandic security cooperation while seeking to keep Greenland within the existing Danish constitutional framework and the broader NATO security structure.
The agreement could therefore become an important development in Arctic security, but its final legal terms and implementation will depend on the formal signing and approval process still ahead.
