Greenland is 2.1 million square kilometres of rock and ice — roughly three times the size of Texas — inhabited by only 56,000 people, most of them Indigenous Inuit clustered along the south-western coast. On a normal Mercator map it looks like an oversized afterthought stapled to Denmark. Flip to a polar projection, though, and it becomes the obvious keystone of the northern hemisphere: a continent-sized platform sitting directly between North America, Europe and the Arctic Ocean, straddling every serious flight path and shipping lane in the far north. This is not a new discovery. The US tried to buy Greenland from Denmark in 1867 (as part of the same push that acquired Alaska) and again in 1946, when the Truman administration offered $100 million in gold. Both times Copenhagen said no. The strategic logic never went away.
For most of recorded history, the Arctic was a wall — a permanent ice cap that made the top of the world effectively unusable. That wall is melting. Arctic sea-ice extent has shrunk by roughly 13% per decade since satellite measurements began in 1979, and the multi-year ice — the thick stuff that survives summer — has collapsed by more than 70%. By mid-century, most models expect ice-free summers across large stretches of the Arctic Ocean. When that happens, the Northern Sea Route across the top of Russia and the Northwest Passage across the top of Canada become viable commercial shipping lanes, cutting distances between East Asia and Europe by roughly 40% compared with the Suez route. New sea lanes always create new choke points — and Greenland sits directly astride the western entrance to every one of them, which is why Russia has already reopened dozens of Soviet-era Arctic bases and China has declared itself a 'near-Arctic state' with a 'Polar Silk Road'.
There is one more piece of geography that has obsessed American and British admirals since 1942: the GIUK gap, the stretch of North Atlantic between Greenland, Iceland and the United Kingdom. Every Russian submarine sailing from the Northern Fleet's base at Murmansk into the open Atlantic must pass through it — there is no other route. During the Cold War, NATO wired the sea floor with SOSUS hydrophones, flew constant P-3 Orion patrols out of Keflavík, and treated the gap as the single most important piece of ocean on the planet. Then, in the 1990s, everyone declared it a museum. Then Russia rebuilt its submarine force with the Yasen-class and started sending them south again. NATO reopened Keflavík. The US Navy stood up the Second Fleet in 2018 explicitly to relearn Atlantic anti-submarine warfare. Whoever bases aircraft and sensors on Greenland closes — or opens — the North Atlantic. It is that simple.
The United States has continuously operated a base on the north-west coast of Greenland since 1943 — first as a weather station, then as Thule Air Base, and today, since 2023, as Pituffik Space Base. It is the northernmost US military installation in the world, only 1,500 km from the North Pole. Its enormous phased-array radar (an upgraded version of the Cold War BMEWS system) watches the entire polar approach to North America and provides early warning of any intercontinental ballistic missile launched from Russia or China over the top of the world. Because ICBMs on that trajectory fly through the Arctic — not, as Hollywood implies, across the Pacific — Pituffik is not an optional site. There is no substitute location for that radar arc. If Greenland ever fell outside the American security perimeter, the US missile-warning architecture would have to be rebuilt from scratch, at enormous cost and with reduced coverage. This is why every US administration since Roosevelt has treated basing rights on the island as non-negotiable.
The retreating ice is also exposing some of the richest untapped mineral deposits on Earth. US Geological Survey estimates suggest Greenland holds significant reserves of rare-earth elements (used in permanent magnets for EVs, wind turbines, guided missiles and F-35 fighters), plus uranium, graphite, lithium, cobalt, nickel, zinc, titanium and iron ore. Kvanefjeld in the south is one of the largest undeveloped rare-earth deposits in the world. This matters because China currently mines around 60% and refines roughly 90% of the world's rare earths, giving Beijing a supply-chain chokehold that has been repeatedly used as a coercive tool — most publicly against Japan in 2010. A working Greenland mining industry, developed with Western capital and Western environmental standards, would be one of the very few near-term alternatives that sits outside China's reach. Which is why every US export-controls package now includes Arctic mineral partnerships, and why Chinese state-linked firms have been quietly turned away from Greenlandic mining licences over the past decade.
Greenland is a self-governing territory within the Kingdom of Denmark. Copenhagen retains formal control over foreign policy and defence, but domestic Greenlandic politics is dominated by two questions — economic viability and eventual independence. Denmark has around six million people, a defence budget in the low tens of billions of dollars, and a total military of roughly 20,000. It cannot meaningfully defend Greenland alone. In every serious scenario, the security guarantor is Washington, under a 1951 defence treaty that gives the US wide latitude to operate on the island. This is the awkward reality behind President Trump's public suggestion in 2019 — and again in 2025 — that the United States should simply buy the place. The offer is theatrical, and it deeply insults Greenlanders and Danes alike. But the underlying pull is not new and not going away: any serious American strategy for the Arctic assumes American access, American radars, American basing rights and, increasingly, American investment in Greenlandic minerals and infrastructure.
Put the pieces together and the American interest becomes very clear, and very compatible with Greenlandic self-determination if handled carefully. The US does not need to own Greenland. It needs uncontested military basing, priority access to critical minerals, and the certainty that no rival great power — Russia today, China tomorrow — establishes a permanent foothold in the western Arctic. Everything Washington has said and done since 2019 — the reopened consulate in Nuuk, the $12 million economic aid package, the Pituffik upgrade, the pressure on Danish and Greenlandic authorities to block Chinese mining bids, the public speculation about purchase, and now the tariff and diplomatic pressure of Trump II — fits that goal. Understanding the goal is what turns a series of confusing headlines into a coherent strategy. It is also the fastest way to see what Greenlanders themselves have leverage over: not whether the Americans will care, but on what terms.
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