Greenland and the Risks to Canadian Arctic Security
By Rob McConnell
Analysis and commentary | September 22 2026
The emerging security agreement between the United States, Denmark and Greenland deserves close scrutiny in Canada. An expanded American military presence on Greenland could improve continental defence. It could also increase Washington’s influence over the Arctic security arrangements on which Canada depends. Canadians should examine both possibilities before accepting assurances that every measure described as protecting North America necessarily protects Canadian independence.
The starting point must be accuracy. President Donald Trump has described the agreement as giving the United States “permanent control over security” in Greenland. That is his characterization, reported by the Associated Press, rather than proof of unlimited American authority over the island. [1] Denmark’s official announcement says the agreement recognizes the Kingdom’s sovereignty and territorial integrity and Greenlanders’ right to self-determination. Its September 20 update said signature was expected during the United Nations General Assembly, with entry into force subject to necessary parliamentary procedures. [2]
This article reflects sources checked on September 22. The full final agreement was not available in the material reviewed. Consequently, “complete military control” should not be presented as an established description of its legal effect. The strongest Canadian concern is the possibility of growing strategic dependence and diminished influence over decisions affecting our North—not evidence that this agreement authorizes an attack on Canada.
What is changing in Greenland
American military access to Greenland is longstanding. The 1951 defence agreement already provided substantial rights to establish and operate agreed defence areas, station personnel, construct facilities and move between installations. It also explicitly preserved Danish sovereignty. The relevant question is therefore how the new arrangement changes existing rights, operational authority and political safeguards. [3]
On September 22, reporting described plans for two additional American bases at the former Cold War sites of Narsarsuaq and Mestersvig. These should be understood as reported expansion plans, not proof that new facilities are already operational. [4] Base locations alone cannot establish the scale of the change. Personnel, aircraft, sensors, weapons, access conditions and command arrangements will determine its practical significance.
A surveillance installation, a logistics hub and a combat deployment can have very different consequences. Canada needs to know what is actually being authorized, which governments must approve future changes, and whether the agreement includes consultation, review and termination provisions. Without that information, both claims of harmless continuity and declarations of total American takeover are premature.
Why this matters directly to Canada
Greenland lies beside Canada’s eastern Arctic, across waters connecting the High Arctic with Baffin Bay, Davis Strait and the North Atlantic. Its strategic importance is therefore immediate for Nunavut and the wider Canadian North. A change in the scale of military activity there can affect surveillance, regional logistics and the assumptions underlying Canadian defence planning.
Canada, Denmark and Greenland signed a boundary agreement in 2022 covering Tartupaluk, also known as Hans Island, and outstanding maritime issues. Negotiators consulted Inuit in Nunavut and Greenland, and the agreement protected traditional access to the island. That settlement provides an important example of Arctic neighbours addressing security and sovereignty through negotiation and respect for local communities. [5]
The new military arrangement does not, merely by existing, establish American authority over Canadian territory. Nonetheless, the capacity to operate around a country can influence that country’s choices. Ottawa needs to assess whether expanded American capabilities will be accompanied by meaningful Canadian participation in regional planning.
The risk of dependence without influence
The most credible concern is an imbalance between the protection Canada receives and its ability to influence the decisions behind that protection. If Washington controls more of the surveillance, transport and infrastructure serving the eastern Arctic, Canada could benefit operationally while becoming more dependent politically. This is a risk assessment, not a finding that the new agreement has already produced that outcome.
Consider a future incident involving an unidentified aircraft or vessel. If Canada depends heavily on another government’s sensors, it may also depend on that government’s decisions about what information to share, how quickly to share it and which response receives priority. Even among allies, different assessments of urgency or national interest can matter.
The answer is not to reject American assistance. It is to maintain enough Canadian capability to verify information, make an independent assessment and contribute a credible response. Cooperation is stronger when both partners bring resources and informed judgment to the table.
Canada’s published NORAD modernization plan includes a $38.6 billion investment over twenty years, announced in 2022, covering surveillance, command and control, weapons, infrastructure and research. [6] An announcement of funding is not evidence that every promised capability has been delivered. Parliament should examine schedules, operating capacity and measurable results, particularly where Greenland’s changing role could alter Canadian requirements.
The Northwest Passage remains a Canadian concern
Canada’s Arctic Foreign Policy states that the waters of the Arctic archipelago, including the Northwest Passage, are Canadian internal waters. [7] The longstanding Canada–United States navigation disagreement cannot be resolved by treating all Arctic cooperation as agreement on sovereignty.
The 1988 Arctic Cooperation Agreement offers a precise example. The United States committed to obtaining Canadian consent for navigation by its icebreakers in waters Canada claims as internal. The agreement expressly preserved each country’s position on the law of the sea. It created a practical arrangement without settling the underlying legal differences. [8]
An expanded military presence in Greenland could make eastern approaches to Arctic routes more significant to American planning. It could also create pressure for convenient transit and support arrangements. That is a plausible future policy issue; the sources reviewed do not establish that the new Greenland agreement changes Northwest Passage access or grants new rights in Canadian waters.
Ottawa should nevertheless seek clear assurances that operational convenience will not be used to bypass Canadian decision-making. Any proposal affecting Canadian territory, facilities or waters must be assessed on its own terms. Greenland’s defence arrangements cannot substitute for Canada’s consent where that consent is required.
Military protection can bring additional exposure
Greenland already hosts the American Pituffik Space Base, whose role includes missile warning and space monitoring. [9] Strengthening such capabilities can improve warning and deterrence. Canada has an obvious interest in earlier detection of threats approaching North America.
At the same time, an expansion in strategically important infrastructure can attract additional espionage, cyber interference or contingency planning by rival states. Depending on the actual systems deployed, it could also affect how those states assess the region during a crisis. These are general strategic possibilities, not evidence of a new attack plan against Canadian communities.
Canada should therefore ask about resilience as well as deterrence. Are civilian communications protected against disruption? Are emergency response and search-and-rescue arrangements adequate for increased activity? Are governments coordinating how they will notify one another of incidents? Defence planning that counts equipment but overlooks communications failures, civilian needs and crisis management is incomplete.
The political meaning of control
The difference between Trump’s language of control and Denmark’s emphasis on sovereignty is consequential. Governments may endorse an arrangement while presenting sharply different understandings of what it means. Canada should not assume that public statements are interchangeable with enforceable commitments.
The test will be how decisions are made when interests diverge. Can Greenlandic and Danish authorities reject a proposed activity? What oversight applies to changes in mission or infrastructure? How will disagreements be resolved? What happens if one party believes another has exceeded the agreement?
These questions matter to Canada because an ally’s approach to consent is relevant to the reliability of regional cooperation. But Canada should also respect Denmark’s and Greenland’s agency. It would be wrong to declare that they have surrendered sovereignty solely because the American president uses expansive language. Canadians can insist on safeguards without speaking over Greenlanders or presuming to decide their future.
Arctic security begins with the people who live there
The North must not be reduced to a map of bases and shipping routes. Inuit communities have their own priorities, knowledge and relationships across the region. Canada’s Arctic Foreign Policy explicitly connects Arctic diplomacy and security with Indigenous participation and northern interests. [7]
A credible Canadian response should make those principles practical. Northern and Inuit representatives should help shape decisions affecting transportation, communications, environmental protection and emergency preparedness. Communities need opportunities to identify local consequences before major infrastructure and operational commitments become difficult to change.
Investments that support reliable communications, useful transport links and emergency services can strengthen civilian life and national resilience together. Conversely, a military project that leaves communities with disruption, environmental burdens or inadequate consultation can undermine the trust on which an enduring northern presence depends.
There is also a case for greater cooperation
A larger American presence is not inherently a threat to Canada. If governed by clear consent and effective coordination, it could improve regional awareness, strengthen deterrence and provide additional support for allied operations. A negotiated agreement that respects Greenland and Denmark could also reduce uncertainty surrounding their relationship with Washington.
The relevant distinction is between cooperation that gives Canada useful capability and a meaningful voice, and dependence that leaves Canada responding to decisions already made elsewhere. Either result is possible in principle. Publicly available information does not yet establish which will prevail.
That uncertainty should encourage scrutiny rather than complacency. Canada should evaluate the agreement according to actual rights, responsibilities and deployments, while resisting the temptation to treat presidential rhetoric as the entire story.
What Ottawa should do now
First, Ottawa should obtain and assess the final text and seek briefings on implementing arrangements affecting Canadian security. Parliament should receive a public explanation of the consequences, with protected briefings where operational details require confidentiality. Canadians deserve to know what has changed and which questions remain unresolved.
Second, Canada should seek dependable consultation with the United States, Denmark and Greenland about major deployments, exercises and infrastructure changes affecting the region. Consultation should occur early enough to influence planning. It should include practical arrangements for warning information, crisis communication and incidents near Canadian territory.
Third, Canada should accelerate the delivery of its own northern capabilities where a documented gap exists. Priorities should follow evidence: surveillance that provides independent awareness, communications that remain available in emergencies, transport and logistical support, and personnel able to operate effectively in northern conditions. Spending should be judged by usable results.
Fourth, Ottawa should strengthen direct relationships with Greenland and Denmark while ensuring Inuit and territorial participation. A durable Arctic policy needs more than a bilateral conversation with Washington. It needs relationships with neighbouring governments and the people whose lives are affected by regional decisions.
Finally, Canadian leaders should distinguish established facts from possible consequences when explaining this issue. Alarmist certainty can damage public understanding just as much as automatic reassurance. There is no need to invent an imminent invasion to make a serious case for Canadian preparedness.
Canada has reason to scrutinize this agreement because security includes the ability to make and carry out national decisions. If an expanded American presence improves shared defence while respecting consent and strengthening Canadian participation, it can serve Canadian interests. If it increases dependence while weakening Canada’s influence, it can create a serious strategic vulnerability.
Our response should be to demand clarity, build credible capability and insist that cooperation respects Canadian decision-making. The future of the Canadian Arctic must be shaped with Canadians, especially the people of the North, fully involved.
Sources and verification notes
This is analysis and commentary, not a finding that the agreement transfers sovereignty or establishes hostile American intent toward Canada. Sources were checked on September 22, 2026. Signature, parliamentary approval, implementing arrangements and deployments should be checked again before republication. Numbered references distinguish reported developments and official positions from the author’s analysis and recommendations.
[4] New York Post — Report on proposed bases at Narsarsuaq and Mestersvig, September 22, 2026
[6] Department of National Defence — NORAD modernization project timelines
[7] Global Affairs Canada — Canada’s Arctic Foreign Policy
[9] The Guardian — The Pituffik US space base in Greenland, March 28, 2025