At the intersection of two crises that should never have met, imagine yourself at the head of a European government today. On one side, the war in Ukraine continues, and military economic and diplomatic support from the United States remains indispensable for Kyiv. On the other, an unprecedented transatlantic crisis is taking shape. American President Donald Trump has openly revived the idea of acquiring Greenland, an autonomous Arctic territory belonging to Denmark, in the name of national security. Taken together, the convergence of these two issues represents a central strategic challenge for Europe.