The agreement reached at the NATO summit in The Hague — committing member states to spend 5% of GDP on defense by 2035 — sounds like an alliance stepping up. It is also a confession. For more than thirty years, the world's most powerful military coalition ran on a structural fiction: that European democracies, wealthy enough to sustain generous welfare states, somehow couldn't afford to defend themselves without Washington footing the majority of the bill.

The 2% of GDP benchmark — itself a target set formally at the 2006 Riga summit and reaffirmed at Wales in 2014 — was routinely missed by most alliance members for most of the years it existed. Germany, the continent's largest economy, spent years hovering around 1.2 to 1.4%. France, a nuclear power and permanent UN Security Council member, barely crossed the threshold. The spending shortfall wasn't a secret. It was a policy choice, and Washington let it stand.

The reason it lasted is not complicated, though it is rarely said plainly: the arrangement benefited both sides in different ways. European governments got a security umbrella they didn't have to fully fund, freeing up fiscal space for social programs that would have been politically impossible to maintain alongside genuine rearmament. Washington, meanwhile, retained strategic primacy — basing rights, command structures, intelligence integration, and the political leverage that comes with being the indispensable partner. Dependency, in that framework, wasn't a bug. It was the architecture.

The Cold War's end deepened the imbalance rather than correcting it. With the Soviet threat dissolved, the political case for defense spending collapsed across European parliaments. NATO remained, but its rationale was increasingly humanitarian and expeditionary — the Balkans, Afghanistan, Libya — missions that could be sustained with professional forces and smart weapons rather than mass armies. The United States, drawn into the post-9/11 wars, needed European political cover more than it needed European battalions. The spending gap widened, and nobody with real power pushed back hard enough to close it.

Russia's full-scale invasion of Ukraine in February 2022 changed the political calculus overnight. For the first time since the Cold War, Article 5 felt like something that might actually need to be invoked. Poland, which shares a border with both Russia and Belarus, pushed its defense spending past 4% of GDP — the highest in the alliance. The Baltic states, which had lobbied for years for serious allied attention to the eastern flank, suddenly found European capitals willing to listen. Germany announced a €100 billion special defense fund within days of the invasion, a reversal of post-reunification policy so dramatic it was given its own term: Zeitenwende, the turning point.

But the Hague target of 5% represents something beyond the post-Ukraine correction. It is a marker of how severely the threat environment has been reassessed — and a direct response to explicit signals from Washington that the previous arrangement is no longer acceptable. American officials have made clear, with increasing bluntness, that the United States intends to reduce the relative weight of its NATO commitments, expecting European members to absorb more of the conventional deterrence burden on their own continent. That pressure has been bipartisan in its underlying logic, even if the tone has shifted sharply under different administrations.

The 5% target will not be easy. For most NATO members, it would require near-doubling current defense budgets within a decade — a fiscal undertaking that competes directly with aging populations, energy transition costs, and already-strained public finances. Defense industries across Europe lack the production capacity to absorb that spending quickly even if the political will holds. Procurement bottlenecks, export control tangles, and the absence of a genuinely unified European defense industrial base mean that money committed on paper will not automatically translate into deployable capability on the ground.

What the Hague summit actually settled, then, is less about 2035 than about the present moment. The alliance has formally acknowledged, in writing and with target attached, that the post-Cold War free-ride is over. Whether European governments deliver on that acknowledgment — or whether 5% joins 2% in the long archive of NATO pledges that sounded serious and landed soft — is the question the next decade will answer. History suggests skepticism is the correct prior. The invasion of Ukraine suggests this time may genuinely be different. Both things can be true, and the tension between them is exactly where the story lives.