We will pay the lions share in blood and treasure if there is a conflict over Greenland. The Danes will offer a mere fraction of what is required to defend it. Why shouldn't we own it? It isn't a temporary measure, it's a permanent situation. It should have been done right after WWII.
Why shouldn’t the United States “own” Greenland? To begin with, Greenland has been part of the Kingdom of Denmark since 1380, and it is not for sale. Any attempt to seize it would violate international law and undermine the very alliances that keep us secure.
Under the NATO charter, an attack on Greenland is an attack on Denmark and therefore an attack on NATO itself. That would obligate every NATO member, including the United States, to respond. In other words, any military action against Greenland would trigger the very alliance we helped build.
Beyond the legal consequences, such an action would severely damage our relationship with one of our most reliable allies. Denmark has never voted against a U.S. resolution at the United Nations. They have stood with us in Afghanistan, Iraq, and Kosovo, providing both troops and logistical support. They also play a critical role in monitoring naval traffic from two of Russia’s most important bases—Kaliningrad and Severomorsk, headquarters of the Russian Northern Fleet. Losing Danish cooperation would cost us far more in intelligence and strategic awareness than any hypothetical gain from seizing Greenland.
It is also unnecessary. The United States already has all the military access it needs under existing defense agreements with Greenland and Denmark. We maintain one active base on the northern coast that is only about 10% developed, along with seven former sites that could be reactivated if needed. The northern coast of Greenland is sparsely populated, home mostly to polar bears, not people, so there is ample room to expand our presence without violating sovereignty or provoking conflict.
In short, attempting to take Greenland would damage our alliances, weaken our intelligence capabilities, violate international law, and undermine U.S. leadership, all to gain something we already have through peaceful cooperation.