By: Abigail Wilcher
Journal of Global Rights and Organizations, Senior Article Editor

United States President Donald Trump, Greenland’s Prime Minister Jens-Frederik Nielsen alongside Danish Prime Minister Mette Frederiksen after signing the updated 1951 Defense of Greenland Agreement, courtesy of the White House.
New York, New York – September 22, 2026, the United States of America and the Government of the Kingdom of Denmark together with the Government of Greenland published an agreement amending and supplementing the original April 27, 1951 Defense of Greenland Agreement (“Agreement”). The 1951 Defense of Greenland Agreement is a bilateral treaty signed by the United States and the Kingdom of Denmark on April 27, 1951, under the framework of the North Atlantic Treaty, granting the United States military rights in Greenland during and after the Cold War. The 2026 Agreement preserves that foundational architecture while adapting it to an increasingly contested Arctic, where intensified military activity and strategic competition have elevated regional security concerns.
Under Article IV of the 2026 Agreement, the United States may modernize and expand operations at Pituffik Space Base and establish additional defense areas at Narsaruaq and Mestersvig. Additional installations may be proposed, subject to consultation and mutual agreement among the United States, Denmark, and Greenland (“Parties”). However, if negotiations do not yield agreement within 90 days, the issue must be escalated through successive diplomatic channels. These provisions enable expanded U.S. capabilities while withholding any unilateral authority to create new defense areas absent consensus. Article VI further enhances operational access by authorizing the movement of military aircraft, vessels, and personnel throughout Greenland, including its territorial waters. The Agreement also contemplates expanded defense capabilities associated with the proposed Golden Dome missile defense system. At the same time, all military activities must accord due respect to Greenlandic society, including traditional hunting, fishing, and cultural practices.

Pituffik Space Base pictured in northern Greenland on October 4, 2023, courtesy of Getty Images.
Beyond operational matters, the Agreement incorporates significant national security safeguards. Article IX generally prohibits non-NATO states from establishing military installations or maintaining a persistent military presence in Greenland without the Parties’ agreement. Article X similarly constrainscertain foreign investments involving critical infrastructure, natural resources, and other sensitive sectors where national security or public order may be implicated.
Article XI addresses the Agreement’s durability and Greenland’s constitutional trajectory. It provides that the Agreement has no expiration date and may be amended only by mutual consent. Should Greenland exercise a right to independence, Denmark and Greenland must ensure that the newly independent state remains within NATO and assumes the existing defense obligations. This provision foregrounds complex issues at the intersection of national self-determination and treaty commitments that extend beyond the territory’s present constitutional status.
The amended Agreement updates a Cold War–era framework for a contemporary Arctic security environment defined by strategic competition, heightened maritime and air activity, and the salience of space and cyber domains. By clarifying NATO’s role, codifying access and mobility, and enabling modernization and expansion of Defense Areas, the Agreement positions Greenland as a critical node in allied early warning, space, and North Atlantic defense architectures. For Greenland, provisions emphasizing “maximum respect,” local sourcing preferences, and structured consultation seek to align defense imperatives with societal, environmental, and economic considerations, acknowledging self- governance and the aspiration that benefits flow to local communities. The restrictions on non-NATO military presence and the investment-screening mechanism establish a firmer perimeter against strategic influence via basing or critical-sector investments, reflecting broader transatlantic security-screening trends. Finally, the Agreement’s permanent nature and its independence-contingency clause aim to preserve continuity in defense obligations across potential constitutional outcomes, thereby mitigating uncertainty for long-term basing, interoperability, and allied planning. Ultimately, the amended 1951 Defense of Greenland Agreement modernizes a Cold War defense framework for today’s Arctic, expanding allied flexibility while embedding consultation and economic-security guardrails likely to shape Greenland’s strategic future.
For further information, please see:
gettyimages – Thule Air Base Stock Photos – 2023.
The White House – United Nations General Assembly 2026 – September 22, 2026 – 2026.















































