Public discussion of President Trump’s interest in Greenland has long treated the idea as a joke rather than a serious policy proposal. Yet however implausible U.S. control of Greenland may seem, the concept is neither impulsive nor unserious—it reflects a calculated assessment of American security interests in the Arctic, a region that has rapidly become central to great-power competition.
The United States and Denmark have cooperated over Greenland for more than a century. In 1916, the U.S. paid Denmark $25 million in gold for the Danish West Indies—now the U.S. Virgin Islands—and recognized Denmark’s sovereignty over Greenland in return. That agreement established a stable partnership later expanded through the 1951 bilateral defense agreement, amended in 2004, which still guarantees American military access to Greenland. The claim that Trump introduced something unprecedented by pursuing U.S. control overlooks this well-established legal and historical framework. What has changed is the environment surrounding it.
The Arctic is warming nearly four times faster than the global average, transforming a previously frozen frontier into an arena defined by militarization, resource competition, and technological expansion. Russia has modernized its Arctic bases, expanded bomber flights, and increased under-ice submarine activity. China, not an Arctic nation, has pursued scientific and commercial operations in the region with clear dual-use implications. Both Moscow and Beijing recognize that Arctic geography translates directly into political and military leverage.
Greenland sits at the center of this transformation. Its location provides unmatched advantages for surveillance, early-warning radar, missile detection, and monitoring Russian submarine routes through the Greenland-Iceland-United Kingdom gap. Geography determines how quickly the United States can detect a nuclear launch or track submarine activity—a fixed ground-based position with Greenland’s vantage point has no technological substitute.
Some argue the U.S. already possesses sufficient access in Greenland through existing treaties. But the last decade shows that access alone does not guarantee security. Washington has repeatedly warned Denmark about Chinese-linked companies seeking to build mines, ports, telecommunications networks, and research infrastructure in or around Greenland.
In the Arctic, infrastructure is never just infrastructure. A port can become a naval access point. A research station can collect intelligence. A fiber-optic project can provide surveillance capabilities.
From America’s perspective, this gap is no longer acceptable. U.S. early-warning systems depend on Greenland. American forces defend the island. American cities rely on radar at Pituffik Space Base for critical minutes of additional detection time unmatched by any continental installation. Yet the U.S. must still rely on another government—far removed from the consequences of failure—to monitor, deter, and block adversarial activity.
Russia’s Northern Fleet, which operates most of its nuclear-armed submarines, must transit waters Greenland helps monitor. As these submarines become quieter and longer-range, early detection grows more critical. Shipping routes in the Arctic are also expanding rapidly—Russia’s Northern Sea Route carried over 36 million tons of cargo last year, a 700 percent increase over the past decade. Control over maritime surveillance, search-and-rescue jurisdiction, and governance frameworks will shape global trade patterns for decades.
China adds economic risk. Greenland contains roughly 1.5 million tons of rare-earth oxides—essential for missile guidance, radar systems, and advanced electronics. China already controls about 60 percent of global rare earth mineral production and more than 80 percent of processing capacity. Allowing Chinese-linked companies even limited footholds in Greenland’s mining sector would deepen U.S. vulnerability.
Nations do not protect their interests by assuming current arrangements will hold forever. They secure them by recognizing when the stakes have changed. The United States cannot cede control over territory so central to its security. Trump understands that the question is not whether Greenland will shape American defense strategy—it already does—but whether the U.S. will secure the degree of control those responsibilities require.