Denmark has drawn a red line in the snow, vowing to defend Greenland against any U.S. military action and warning that such a move would spell the end of NATO. The escalating rhetoric between the NATO allies underscores growing tensions over the strategically vital Arctic island, as American leaders push for control amid resource and security concerns.

Prime Minister Mette Frederiksen stated bluntly that a U.S. assault on Greenland, a self-governing Danish territory, would trigger NATO's Article 5 mutual defense clause—ironically pitting allies against each other and dismantling the alliance. Lawmaker Rasmus Jarlov reinforced this in recent interviews, saying Denmark would fight back despite the odds, labeling any conflict "devastating" for all involved. Greenland's Prime Minister Jens-Frederik Nielsen also weighed in, urging respect for his people's democratic rights amid the superpower tug-of-war.

Greenland's appeal lies in its untapped rare earth minerals and newly accessible Arctic routes due to climate change, drawing U.S. interest to counter Russia and China. President Donald Trump has floated annexation for national security, with VP JD Vance criticizing Denmark's oversight, while the U.S. maintains Thule Air Base under a longstanding deal. Denmark argues it safeguards the region effectively, rejecting force as a solution.

The dispute risks fracturing NATO unity, with European partners backing Denmark and rules allowing Danish forces to open fire on invaders—a stark Cold War-era measure. Observers note this echoes Trump's 2019 purchase proposal, but current threats have heightened alarms, potentially harming transatlantic trust. Diplomats suggest Greenland-led negotiations or economic incentives could ease tensions without upending alliances.