The Trump administration on Tuesday signed an agreement with the Kingdom of Denmark and the autonomous territory of Greenland at the United Nations.
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administration → sign → Nations
It affirms and expands the American military presence in Greenland while maintaining Greenlandic autonomy and Danish sovereignty.
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It → affirm → autonomy
But an agreement allowing access is only the beginning.
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agreement → allow → access
Washington must now turn it into an enduring Arctic pillar of North Atlantic defense.
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Washington → turn → defense
President Donald Trump has been maneuvering toward a Greenland deal since 2019, during his first term.
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Trump → maneuver → term
And like much of what Trump touches, Greenland has become a partisan and geopolitical flashpoint ever since.
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Greenland → touch → what
For all of Trump’s critiques of NATO, he is moving toward significantly bolstering the security of its members.
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he → move → members
Improving U.S. military infrastructure and limiting adversaries’ influence are important goals.
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Improving → improve → influence
The harder business is now to institutionalize this agreement so it establishes an enduring strategic security arrangement for the North Atlantic.
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it → institutionalize → Atlantic
The language of the agreement makes it permanent on paper, but the United States must now make it permanent in practice.
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it → make → practice
If Greenland is to become an institutional pillar for Arctic and American defense, much as Germany and Japan serve as military hubs in Europe and the western Pacific, Washington now needs to fund, build, and secure the Greenland expansion.
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Washington → become → expansion
The White House has touted the agreement as coming at “no cost to American taxpayers.”
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House → tout → taxpayers
Implementing it will not be.
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Implementing → implement → it
Expanding America’s military presence means constructing and maintaining bases, deploying personnel and equipment, and building the infrastructure necessary to operate in one of the world’s most inhospitable environments.
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Expanding → expand → environments
That requires money, and therefore Congress.
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That → require → money
The agreement provides an impressive foundation.
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agreement → provide → foundation
It allows the U.S. to expand Pituffik Space Base and establish new defense areas at Narsarsuaq in southern Greenland and Mestersvig in the east.
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U.S. → allow → east
It also provides procedures for establishing even more defense areas and grants the U.S. broad rights of military movement, including for aircraft and vessels.
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It → provide → aircraft
But rights to build military infrastructure are not military infrastructure.
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rights → build → infrastructure
The U.S. must develop in Greenland the kind of enduring military ecosystem it has built over decades in places such as Germany and Japan.
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it → develop → Germany
Greenland does not need tens of thousands of American troops, as we have in those countries.
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we → need → countries
But it does need the airfields, maritime facilities, sensors, logistics, prepositioned equipment, and other permanent military capabilities necessary to make it a genuine Arctic hub.
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it → need → airfields
This would also fit an evolving division of responsibility within NATO.
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This → fit → NATO
As European allies take greater responsibility for deterring Russia along the alliance’s eastern flank, the U.S. can devote greater attention to the Arctic and the northern approaches to North America.
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U.S. → take → America
Indeed, the new agreement itself calls for greater NATO planning, presence, and exercises in the Arctic.
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agreement → call → Arctic
Greenland can anchor that effort.
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Greenland → anchor → effort
The agreement prohibits countries outside NATO from establishing military installations or maintaining a persistent military presence in Greenland unless the parties agree otherwise.
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parties → prohibit → Greenland
That keeps Russia and China out.
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That → keep → Russia
But an agreement with no expiration date should not assume that today’s NATO membership will forever distinguish friend from potential adversary.
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membership → assume → adversary
Turkey illustrates the problem.
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Turkey → illustrate → problem
It is a NATO member and therefore does not fall within the agreement’s categorical prohibition, even as its relationship with the U.S. and other NATO members has grown contentious, and its president is considering full membership in the China- and Russia-led Shanghai Cooperation Organisation.
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president → fall → Organisation
That does not mean Turkey now necessarily has a right to establish a base in Greenland, nor that it presently seeks one.
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it → mean → one
It does demonstrate the weakness of using alliance membership alone as a permanent proxy for strategic alignment.
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It → demonstrate → alignment
Any persistent third-country military presence in Greenland must instead require affirmative American, Danish, and Greenlandic consent.
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presence → require → consent
Finally, Washington should consider giving the relationship greater institutional standing and legal permanence at home.
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Washington → consider → home
There is a strong argument on the other side: the 1951 Greenland defense agreement has survived for 75 years, was successfully modernized in 2004, and the new 2026 agreement is itself designed for extraordinary durability
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agreement → be → durability
It has no end date, can be amended only by mutual consent, and even anticipates its continuation if Greenland someday becomes independent.
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Greenland → have → continuation
But if Greenland develops into a permanent pillar of American defense, its legal foundation should eventually reflect that importance.
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foundation → develop → importance
America’s security relationships with Japan and South Korea rest on bilateral treaties approved by the Senate.
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relationships → rest → Senate
A comparable arrangement with Greenland and Denmark, or another form of congressional institutionalization, deserves consideration as the new security dynamic develops.
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dynamic → deserve → consideration
…and 9 more, not listed.
The Aporia
