What is unfolding across Europe’s security landscape is not a sudden crisis, but the delayed consequence of decisions made over three decades. The pattern is remarkably consistent: systematic downsizing of armed forces after the end of the Cold War, a failure to reverse course after clear warning signals in 2014, and a hesitant, fragmented rearmament effort after 2022 that still falls short of the scale required. Underneath all of it sits a persistent assumption—rarely stated openly, but deeply embedded in policy thinking—that the United States would ultimately guarantee Europe’s security.
For a long time, that assumption appeared rational. After 1991, the strategic environment seemed permissive. Russia was weak, fragmented, and economically constrained. NATO enlargement progressed under the implicit understanding that Article 5 was backed not just by alliance solidarity, but by overwhelming American military superiority. European governments optimized for this environment: they reduced standing armies, cut heavy equipment, shrank ammunition stockpiles, and redirected spending toward welfare systems and economic priorities. Defense became a political afterthought, often framed as a legacy cost rather than a core function of the state.
The scale of the drawdown is often underestimated. Germany, for instance, reduced its tank fleet from several thousand during the Cold War to a few hundred operational units today. The Bundeswehr’s readiness issues—ranging from spare parts shortages to limited deployable formations—became almost symbolic of broader European trends. The United Kingdom, once a backbone of NATO’s conventional power in Europe, cut its army to its smallest size since the Napoleonic era. France maintained more expeditionary capability, but even there, stockpiles and high-intensity war readiness were not prioritized at scale. Across much of Europe, artillery—historically the decisive arm in continental warfare—was allowed to atrophy, with limited production capacity and minimal reserves.
Then came 2014. Russia’s annexation of Crimea and the war in eastern Ukraine were not ambiguous signals. They demonstrated both intent and capability. This was not a grey-zone nuisance; it was conventional force used to redraw borders. And yet, while rhetoric shifted and NATO began rotating forces eastward, structural rearmament in Europe did not follow with urgency. Defense budgets in many countries ticked upward, but procurement timelines remained slow, industrial output remained limited, and political attention drifted. The prevailing belief seemed to be that deterrence could be maintained without fundamentally rebuilding military mass.
The consequences of that miscalculation became fully visible after 2022. The war in Ukraine exposed a reality that many planners had not internalized: high-intensity warfare consumes vast quantities of matériel at a rate that peacetime inventories cannot sustain. Artillery shells, for example, are expended in tens of thousands per day in sustained combat. European stockpiles, in many cases, were measured in weeks—not months—of high-intensity operations. Production lines that had been optimized for low-volume, high-cost procurement struggled to scale. Even when funding was allocated, industrial capacity could not be expanded overnight.
Germany’s much-publicized €100 billion special defense fund is a telling example. While politically significant, its translation into actual capabilities has been slow. Procurement processes, regulatory constraints, and industrial bottlenecks mean that the Bundeswehr’s transformation will take years, not months. Poland stands as a partial exception, rapidly increasing defense spending and procuring large quantities of equipment—from South Korean tanks and artillery to American missile systems—but even there, integration and training take time. The Baltic states have shown political will and urgency, but their size limits the scale of what they can field independently.
Meanwhile, ammunition production has become a strategic chokepoint. European industry, having operated for decades under just-in-time, low-volume assumptions, lacks the surge capacity required for prolonged conflict. Expanding production requires not just funding, but workforce, raw materials, and time. Even optimistic projections suggest that it will take several years to reach levels consistent with sustained high-intensity warfare. In the interim, Europe remains dependent on external supply—primarily from the United States.
This dependency extends beyond ammunition. Intelligence, surveillance, and reconnaissance capabilities are heavily reliant on American assets. Strategic airlift, missile defense, and advanced command-and-control systems are similarly US-centric. In effect, Europe possesses significant economic power and technological sophistication, but its military ecosystem remains incomplete without American integration.
That asymmetry has strategic consequences. The United States retains global flexibility. It can shift forces between theaters, adjust its commitments, and prioritize according to its own strategic calculus. Europe cannot relocate itself. Its geography fixes its exposure, particularly along the eastern flank. This creates a structural imbalance: in moments of political divergence, the side with greater flexibility holds leverage.
Consider the implications of a serious transatlantic disagreement—whether over Iran, China, or broader strategic priorities. If the United States were to reduce its military footprint in Europe or condition its commitments, Europe would face an immediate capability gap. Forward-deployed American forces, prepositioned equipment, and integrated command structures are not easily replaced. The timeline for building equivalent capabilities domestically would be measured in years, if not decades.
In such a scenario, Europe would confront a set of difficult choices, none of them politically comfortable. One path would involve accepting increased risk, particularly for frontline states such as the Baltics and Poland, effectively relying on deterrence by uncertainty rather than overwhelming force. Another path would require a rapid and large-scale mobilization of resources: defense spending rising toward levels historically associated with wartime economies, expanded conscription, and the redirection of industrial capacity toward arms production.
Historical analogies are instructive here. During the Cold War, many European countries maintained defense spending in the range of 3–5% of GDP, with large conscript armies and substantial reserve forces. Industrial bases were structured to support sustained production of military equipment. Today, even reaching 2% has been a political struggle in some countries, and the institutional frameworks for rapid expansion have atrophied.
The question of conscription is particularly sensitive. Many European societies have moved toward professional, volunteer forces, reflecting both demographic trends and political preferences. Reintroducing or expanding conscription—especially on a universal basis—would represent a profound shift in the social contract. Yet without it, scaling manpower to the levels required for territorial defense becomes significantly more challenging.
Industry presents another constraint. Modern defense production is complex, capital-intensive, and globally integrated. Supply chains span multiple countries, and key components may depend on external sources. Scaling production to “World War II levels,” as some commentators suggest, is not simply a matter of political will; it requires rebuilding entire ecosystems of suppliers, skilled labor, and infrastructure. That process cannot be improvised under pressure.
All of this underscores a central point: the current situation is not primarily the result of external pressure, but of internal choices. Europe’s political class, over many years, prioritized short-term economic and social considerations over long-term defense readiness. The result is a structural dependency that limits strategic autonomy.
From a military analytical perspective, the issue is not whether Europe can eventually build sufficient capability—it can—but whether it can do so within the timeframes dictated by the security environment. Deterrence is not a static condition; it depends on credible, ready forces in the present, not planned capabilities in the future. Delays, even if temporary, create windows of vulnerability.
The broader implication is that Europe now faces a binary strategic decision. One option is to accept continued dependence on the United States, with all the political and strategic constraints that entails. This path preserves near-term security but limits autonomy and exposes Europe to shifts in American policy. The alternative is to undertake a rapid, large-scale transformation of its defense posture, accepting the economic and social costs in exchange for greater independence.
Neither option is without risk. Dependence carries the risk of external constraint; transformation carries the risk of internal disruption. But what is no longer viable is the middle ground—the assumption that modest increases in spending and incremental reforms will be sufficient. The scale of the challenge has outgrown incrementalism.
Ultimately, the debate is not about personalities or individual political figures. It is about structural realities: capability, capacity, and time. Europe’s security environment has changed, and the legacy systems—both institutional and conceptual—have not kept pace. The longer this gap persists, the more pronounced its consequences will become.
What Europe is confronting now is the end of an era in which security could be outsourced. The transition to a new model—whether based on renewed dependence or genuine autonomy—has begun, but it remains incomplete. And in that incomplete state lies the strategic tension that defines the present moment.