The United States has not taken Denmark. Denmark remains a sovereign nation and NATO ally. Recent developments focus on a new Arctic security agreement involving Greenland, an autonomous territory of the Kingdom of Denmark.
On September 18, 2026, U.S. President Donald Trump announced that the United States, Denmark, and Greenland reached a deal granting the United States permanent control over security and related needs in Greenland. The agreement addresses U.S. national security concerns, expands American military access, and restricts adversaries from establishing bases or making sensitive investments in Greenland without U.S. approval. Trump described the pact as historic and stated it comes at no cost to the United States.
Danish Prime Minister Mette Frederiksen and Greenland government leader Jens-Frederik Nielsen confirmed the arrangement. Officials from Denmark and Greenland stated that the deal strengthens security in the Arctic and North Atlantic while preserving Greenland’s sovereignty, self-determination, and role in international cooperation. The agreement does not transfer territory or change Greenland’s status within the Kingdom of Denmark. Signing is expected during the United Nations General Assembly in New York, subject to parliamentary procedures.
Background on US Interest in Greenland and Denmark Relations
Greenland holds strategic value due to its Arctic location and resources. The United States has maintained a military presence there, including at Pituffik Space Base, under prior defense agreements that recognize Danish sovereignty.
In 2025 and early 2026, Trump repeatedly stated that the United States required greater control of Greenland for national security. Statements included interest in purchase and, at times, refusal to rule out other measures. Danish leaders responded that any military action against NATO territory would end the alliance. Greenland officials rejected annexation proposals. Contingency preparations by Denmark were reported during heightened tensions.
Historical notes include the 1941 U.S.-Denmark defense agreement on Greenland (recognizing Danish sovereignty), a 1946 U.S. purchase offer that Denmark declined, and the 1917 U.S. acquisition of the Danish West Indies.
Key Points of the September 2026 US-Denmark-Greenland Security Agreement
- Permanent U.S. ability to secure and defend interests in Greenland.
- Expanded U.S. military access, basing, and overflight rights.
- Ban on non-NATO adversary bases, troop presence, or sensitive investments without U.S. approval.
- No change to Danish or Greenlandic sovereignty.
- Builds on existing Cold War-era arrangements.
U.S. Secretary of State Marco Rubio called the deal a historic win that fully addresses national security concerns in Greenland. Full text details remain limited pending formal signature.
Current Status
No military takeover, annexation, or transfer of Denmark or Greenland has taken place. The Kingdom of Denmark continues as a sovereign state. The agreement represents negotiated security cooperation focused on the Arctic region.
This report is based on public statements from U.S., Danish, and Greenlandic officials as of September 19, 2026. Further details are expected after the planned signing.
