Greenland’s location in the Arctic places it at the heart of global nuclear defense planning, a reality highlighted anew by U.S. President Donald Trump’s renewed push for his proposed “Golden Dome” missile defense system.
In any hypothetical nuclear conflict involving the United States, Russia and China, intercontinental ballistic missiles would likely travel along the shortest routes, over the Arctic. That trajectory makes Greenland a critical point for early detection and potential interception.
Trump has argued that U.S. ownership of Greenland is essential for the success of the multibillion-dollar “Golden Dome,” a layered missile defense system he claims will be operational before 2029. He has said modern offensive and defensive weapons systems make control of the territory especially important, sparking alarm in Denmark and among Greenlanders.
A key element of Greenland’s importance is the Pituffik Space Base, formerly known as Thule Air Base. Located above the Arctic Circle, the base hosts a powerful early-warning radar capable of detecting and tracking ballistic missile launches from thousands of kilometers away, including missiles fired from Russia or China toward the United States.
Defense analysts note that the base gives Washington valuable extra minutes to assess and respond to potential attacks. The radar can monitor large swaths of the Arctic and detect objects as small as a car, according to the U.S. Air Force.
However, experts question Trump’s claim that U.S. ownership of Greenland is necessary. The United States has operated at Pituffik for decades under a 1951 defense agreement with Denmark, without sovereignty over the island. Analysts also point out that other allied locations, such as early-warning radar sites in the United Kingdom, play similar roles without any U.S. ownership claims.
Some experts argue that emerging space-based sensors planned under the “Golden Dome” could eventually reduce Greenland’s strategic importance. They also note that Denmark has historically been a highly cooperative U.S. ally, making expanded military access possible without drastic political steps.
As debates continue, Greenland remains a pivotal, and sensitive, crossroads in global nuclear defense calculations.