Greenland is indisputably the front line of American homeland defense. For decades, Washington relied on a passive 1951 security framework that left the vast, icy periphery vulnerable to great-power maneuvering. That changed on Tuesday, when a historic trilateral defense pact in New York executed a vital strategic pivot. By expanding Pituffik Space Base, reclaiming the former U.S. World War II airfield at Narsarsuaq, and securing a new military footprint at the Danish outpost of Mestersvig, our country moved past passive neglect. Washington now commands the shortest polar transit routes separating Eurasia from North America.

History warns against complacency in this frozen theater. In March 1943, Nazi saboteurs slipped onto Sabine Island, igniting the only ground engagement in the Western Hemisphere before U.S. bombers erased the threat. That forgotten skirmish proved an eternal geopolitical truth: Whoever rules Greenland’s harsh geography dictates control over the North Atlantic. Yet, standard Washington policymakers ignore this reality, viewing the Arctic as an environmental sanctuary rather than an actively contested, highly militarized zone.