Europe is facing a security reckoning. Russia’s invasion of Ukraine, shifting U.S. expectations, and rising military warnings have shattered the old assumptions of post–Cold War stability. The European Union is now racing to rearm, not because war is guaranteed, but because unpreparedness no longer feels acceptable.

The continent’s security once relied on diplomacy, economic ties, and American protection through NATO. But as those supports wobble, EU leaders are adopting a more urgent tone—focusing on defense budgets, logistics, and timelines. Nations like Lithuania, Poland, and Sweden are already deep into civil defense drills and infrastructure upgrades, shaped by history and proximity to Russia.

Public sentiment, however, lags behind. While governments build up arsenals and cooperation platforms like Readiness 2030 and ReArm Europe, polls reveal most EU citizens wouldn’t fight to defend borders. The disconnect between institutional urgency and popular will remains a major challenge, especially in Western Europe.

Still, Europe is investing at an unprecedented scale. New funding programs, mobility plans, and military spending targets are reshaping what European defense looks like. Whether these efforts can move fast enough—before external pressures make the choice for them—may define the EU’s future as a true security actor.