In a significant development for High North security, the Danish Air Force recently deployed F-35A Lightning II fighter jets to Greenland for the first time. This operational milestone preceded the official signing of a trilateral security agreement between the United States, Denmark, and Greenland in New York, signaling a renewed Allied effort to reinforce NATO’s northern flank amid escalating strategic competition in the Arctic.
First-Ever Danish F-35 Deployment to Kangerlussuaq
The Royal Danish Air Force marked an operational premiere by deploying two F-35A stealth fighters to Kangerlussuaq Airport, a strategic facility that houses a permanent logistics and operations base for the Danish Joint Arctic Command.
The fighter jets did not operate in isolation. On September 16, they integrated with a multinational detachment consisting of four U.S. Air Force F-16 Fighting Falcons and two Royal Canadian Air Force CF-18 Hornets that had departed from CFB Goose Bay in Newfoundland and Labrador. The combined fleet executed training profiles over Greenlandic airspace as part of the NATO Arctic Sentry initiative, a framework established last February to strengthen surveillance and presence in the region.
The exercise required the participating aircraft to fly extended distances to reach their operational areas. The Danish F-35A fighters took off from Keflavik Air Base in Iceland and were supported by a French Air Force Airbus A330 MRTT, which performed in-flight refueling, an allied AWACS aircraft providing airborne command and control, and a Danish Bombardier CL-604 Challenger ensuring search and rescue cover. This multinational effort was aimed at refining coordination capabilities across different allied nations operating over the vast distances of the High North.
According to the Danish Armed Forces, the extreme volatility of Arctic weather, extended flight routes, and the lack of infrastructure for potential diversions require crews to devote a considerable amount of time to planning, noting that the vast majority of mission success is decided well before the wheels leave the tarmac.
Diplomatic Détente: The Trilateral Security Agreement
Following the conclusion of these aerial exercises, the United States, Denmark, and Greenland finalized a trilateral security agreement, formally signed yesterday in New York on the sidelines of the UN General Assembly. This diplomatic breakthrough has brought a sense of relief to Copenhagen, effectively lowering political temperatures after a period of tensions and a distinctly hostile attitude from the Trump administration toward Copenhagen in 2026.
Prior to the official release of the agreement's text, Danish Foreign Minister Lars Løkke Rasmussen told public broadcaster TV2 that “the arrangement will be structured in such a way that responsibility for security in the Arctic does not fall solely on Denmark or the United States.” To a large extent, he continued, “NATO would handle it.” Sovereign control over the island remains firmly with Copenhagen, as emphasized by Danish Prime Minister Mette Frederiksen, while her Greenlandic counterpart Jens-Frederik Nielsen clarified the text contains clear references to the Greenlandic people’s right to self-determination.
Updated Clauses for High North Security
According to these initial statements, the new arrangement does not differ significantly from the original 1951 framework agreement between the United States and Denmark, which already granted Washington extensive military access to Greenlandic territory and the ability to operate strategic installations. However, certain passages indicate a strategic adjustment in relations between the parties, introducing critical updates to protect the region from foreign hybrid strategies:
- Geoeconomic Defensive Measures: the text now prevents economic investments in sensitive sectors or critical infrastructure in Greenland by non-NATO countries without Washington’s written approval.
- The Independence Provision: in a notable shift, the military access clauses are designed to remain in effect even if Nuuk decides to declare independence from Copenhagen in the future, cementing the long-term defense relationship between the United States and the island. The text ensures Greenland remains within NATO.
According to sources familiar with the matter who spoke to Reuters, Washington's next steps under this framework will include opening two new military installations. These facilities will be established in Mestersvig—where there is an outpost of Denmark's elite Sirius Dog Sled Patrol—and in Narsarsuaq, which during the 1940s hosted the U.S. facility known as Bluie West One. These new deployments follow earlier, separate modernization efforts aimed at expanding the U.S. Space Force-operated early-warning radar site at Pituffik Space Base.
This geopolitical outcome, as many regional observers point out, underscores that Arctic security objectives could be achieved without jeopardizing NATO’s internal unity. Denmark’s balanced approach during the most tense moments of the diplomatic standoff has recently drawn praise from American commentators. In an editorial published by The Wall Street Journal and cited by the Danish newspaper Berlingske, Denmark was recognized as a “model ally,” highlighting how Copenhagen's steady diplomacy managed to salvage the partnership despite the friction caused by the White House's earlier rhetoric.
Featured image: two Royal Danish Air Force F-35A fighters patrolling the Arctic airspace over Greenland. (Credit: Rune Dyrholm / Forsvaret)
