Key facts
- A new security agreement has been reached between the U.S., Denmark, and Greenland.
- The agreement was announced by U.S. President Donald Trump on September 18, 2026.
- The deal aims to bolster security and U.S. military presence in the Arctic.
- The agreement reaffirms Danish sovereignty and Greenland's right to self-determination.
- The arrangement does not entail a transfer of sovereignty to the U.S.
- The agreement includes restrictions preventing U.S. adversaries from establishing bases or sensitive investments in Greenland without U.S. consent.
The United States, Denmark, and Greenland have reached a new security agreement that will bolster U.S. military presence and capabilities in the Arctic. Announced by U.S. President Donald Trump on September 18, 2026, the deal aims to enhance security in the region while reaffirming Danish sovereignty and Greenland's right to self-determination.
The agreement expands the U.S. military presence in Greenland, including arrangements for access, overflight rights, and the development of military facilities. It also imposes restrictions preventing U.S. adversaries from establishing bases or making sensitive investments on the island without U.S. consent. However, the accord does not involve a transfer of sovereignty to Washington, and its full legal details are pending release and formal procedures.
This agreement represents a shift from previous U.S. demands for control over Greenland to a focus on security arrangements that grant strategic presence without altering the island's legal status. The U.S. military has had a presence in Greenland since 1951, with arrangements amended in 2004. Thule Space Base remains a key element of this significance, involved in missile early warning, missile defense support, and space domain awareness. The Arctic's growing importance for NATO security, due to its maritime routes and military capabilities, underscores the strategic value of Greenland's location.