Spurred by the Ukraine war and deepening doubts about America’s commitment to its NATO allies, Europe has begun building the financial and industrial foundations of military power. Unless it also establishes a clear political authority capable of directing that power, however, Europe could end up more vulnerable than ever.
MADRID—Europe is rearming, and not a moment too soon. Not only has the United States all but stopped supporting Ukraine in the face of continuing Russian aggression, but now President Donald Trump has announced the withdrawal of US troops from Germany. America’s commitment to European security has never seemed so fragile.