Can Europe actually rearm? Structural constraints on European defense industrial capacity
Why Europe Can't Just Buy Its Way to a Bigger Army
Based on analysis of a 138-node, 458-edge knowledge graph mapping the structural constraints on European defense industrial capacity.
The Basic Puzzle
Imagine you run a lemonade stand, and you’ve decided you need to sell ten times as much lemonade. So you tell your parents you need ten times more money for lemons. They give you the money. But then you discover your neighborhood only has one lemon tree, you only own one pitcher, and you fired your little sister three years ago so you have nobody to squeeze lemons. More money did not make more lemonade.
That is roughly what the graph shows is happening with European defense right now.
European countries have made very large public promises to spend more on their militaries — the most recent target being 5% of each country’s entire economy, agreed at a NATO summit in The Hague. The graph’s most important finding is that spending more money on the problem may actually make the problem worse in the short term, not better. The reason is that the factories, workers, and raw materials needed to turn that money into actual weapons and ammunition are not available in quantities that match the money being spent. When lots of money chases too few suppliers, prices go up. When prices go up, the same budget buys less than it would have before the spending increase. The graph calls this the “Defense Spending Self-Defeating Inflation Trap,” and it feeds directly back into the gap between what Europe is paying for and what it is actually receiving.
The Three Locks on the Supply Cabinet
The graph identifies three physical problems that are completely separate from each other — solving one does not help with the other two — and all three involve depending on actors outside Europe.
The chemistry problem. Artillery shells require an explosive propellant called nitrocellulose. Nitrocellulose is made from cotton fibers, and Europe’s supply of those fibers comes primarily from China. This is not an industrial dependency that can be fixed by building more European factories — it starts with an agricultural product that Europe does not grow in sufficient quantities. The graph records no credible solution to this one. Every other major bottleneck in the graph has at least one edge pointing toward a partial fix. The cotton fiber problem has none.
The chip problem. Modern weapons systems — from missiles to communications equipment — require semiconductors. The most advanced chips depend on either American export approval (through rules called ITAR, which allow the US to veto exports of American-designed technology) or on Taiwanese manufacturing. Europe has limited ability to build these chips domestically at the required scale in the near term.
The transport problem. Moving military equipment quickly across long distances requires large transport aircraft. The aircraft Europe relies on for this are American C-17s. Europe does not own enough heavy-lift aircraft of its own to sustain large-scale logistics independently.
None of these three can be fixed by spending more euros on European defense budgets. They require separate, specific actions in separate, specific domains — agricultural policy, semiconductor industrial policy, and aircraft procurement — each involving different actors and different timescales.
The Workshare Rule That Nobody Can Delete
Here is a rule that has shaped European defense for decades: when several countries build a weapons system together, each country’s defense industry must get a share of the work roughly equal to that country’s share of the cost. This is called “juste retour” — French for “fair return.”
The logic seems reasonable. If Germany pays 40% of the cost, German factories should do roughly 40% of the work. But in practice, this means that decisions about who builds which part are made based on political fairness rather than on who can build it best, cheapest, or fastest. And when countries disagree about who deserves which work, programs stall or collapse entirely.
The graph traces this rule as the primary cause of the collapse of Europe’s largest joint fighter jet program (called FCAS or SCAF), which was a Franco-German-Spanish project. It also shows the rule perpetuating a striking statistic: NATO has 178 different types of weapons systems, compared to the United States, which has about 30 types to cover the same role. That redundancy — 178 slightly different versions of things that could be one standardized thing — costs Europe enormous amounts of money and makes equipment harder to maintain, share, and supply.
What the graph also shows is that several actors have found ways to work around juste retour without actually changing the rule. Poland and South Korea structured their deal differently. Two defense companies (KNDS) converted their joint structure into a listed company so workshare becomes an internal business decision rather than a government negotiation. Nordic countries cooperate through a framework that sidesteps the normal procurement process. But in every case, the rule itself remains intact. Each new project has to find its own individual workaround. The underlying political mechanism has not been reformed.
The Irony at the Center of the Graph
Ukraine is fighting a war that has made European governments realize they need to rearm. Ukraine is also the cheapest available source of the artillery ammunition those governments need to buy while they rearm.
Ukrainian factories can produce a 155mm artillery shell for roughly $1,500. European factories charge around $4,000 for the same shell. The EU’s main financing program for building up European defense industry (called SAFE) is explicitly trying to fund European production. But if governments are also buying cheaper Ukrainian shells, they are reducing the revenue that European factories need to justify expanding their capacity.
The graph records this as a genuine structural contradiction, not a political dispute or a values question. The cheaper option undercuts the long-term investment, and the long-term investment takes years to produce results. Both things are true simultaneously, and the graph does not resolve which one dominates.
The Loops That Keep Spinning
The graph identifies several situations where the problem causes the solution, and the solution causes the problem.
The most straightforward one involves workers. Europe’s defense industry lost a huge portion of its skilled workforce after the Cold War ended in 1991, because governments stopped ordering weapons and factories closed. That loss of workforce is now one of the main reasons factories cannot expand quickly even when they have money. But the workforce shortage itself exists because the factories were not producing, which means there were no jobs to train people into. The shortage feeds the shortage.
A more complicated loop runs through France. France has significant national debt. That debt makes it difficult to fully fund its own military expansion plans. Falling short on those plans means France has less political credibility when it offers to extend its nuclear deterrent to cover other European countries. But France’s nuclear deterrent is one of the main reasons European defense integration remains politically complicated — other countries have different views on how nuclear responsibility should be shared or not shared. That political complication contributes to the fragmented industrial structure described earlier. And the fragmented industrial structure makes it more expensive for everyone, including France, to rearm — which puts more pressure on French finances. The loop closes.
The Company That Is Holding Everything Together (And the Risk That Creates)
One company — the German manufacturer Rheinmetall — appears more times in the graph than almost anything else, and with higher weight (meaning the analysis considers it more significant, not just more connected). Rheinmetall is the primary hub through which European artillery production, ammunition scaling, and industrial expansion are supposed to flow.
This creates a structural concentration risk. Rheinmetall is simultaneously constrained by the nitrocellulose shortage, competing against cheaper Ukrainian ammunition, limited by the ESG (environmental, social, governance) investment restrictions that spent years steering money away from defense companies, and dependent on German government budget decisions that were only recently unlocked. If any of the major constraint edges in the graph tighten — if the cotton fiber supply gets worse, if capital markets shift, if German fiscal politics change — the effects ripple across almost the entire European rearmament story at once. The graph notes this risk but records no alternative hub being built to distribute the concentration.
Software Is Growing Faster Than Bullets
A separate set of nodes in the graph tracks a significant shift in how defense technology works. Modern warfare in Ukraine has demonstrated that cheap drones guided by artificial intelligence can perform roles that previously required expensive manned aircraft. Several European companies, including a startup called Helsing, are building systems along these lines.
The graph records substantial investment and attention flowing into this software-defined approach to defense. But it also records that software layers partially mitigate the physical constraints without resolving them. You still need shells; you still need propellant; you still need transport aircraft. The software-defined track is running in parallel to the hardware problem, not instead of it. Capital is moving toward the software layer faster than the hardware constraints are being removed.
What the Graph Predicts (Without Promising)
The analysis identifies several tensions that appear likely to produce visible results within a few years.
Nine European countries are currently reviving some form of mandatory military service. Those conscripts come from the same working-age population that defense factories are trying to hire. The graph records this as an amplifying conflict, not a resolved one. As both programs scale, the competition for workers should become politically legible.
Several southern European countries — with high existing debt — have made NATO spending commitments that the graph records as arithmetically impossible to meet without cutting welfare programs or running larger deficits. The graph connects this to electoral pressure in France, Italy, and Spain, where populist movements are already gaining support. The 2029 NATO readiness deadline creates a fixed commitment horizon that intersects with election cycles in all three countries.
The graph also notes that the joint fighter jet program between the UK, Japan, and Italy (called GCAP) has adopted an equal-thirds workshare model explicitly designed to avoid the failures of the Franco-German program. But juste retour has no dismantlement edge in the graph. The new model changes how work is divided; it does not change the underlying national incentive to demand industrial work in exchange for financial contribution.
Bottom Line
The graph shows a system where the main levers being pulled — more spending, more commitments, more programs — are running through a set of structural bottlenecks that the spending does not directly address. The three physical chokepoints (chemistry, chips, transport) require targeted non-financial interventions. The workshare rule is being routed around one program at a time rather than reformed. The workforce deficit is self-reinforcing. The capital flowing into the system amplifies both the primary industrial anchor (Rheinmetall) and the gap that anchor is meant to close.
What the graph does not show is a single mechanism that resolves these constraints simultaneously. What it does show is a large number of partial mitigants, bypasses, and workarounds operating in parallel — each effective in a specific domain, none sufficient on its own, and none addressing the feedback loops that keep the underlying gaps open.
The most precisely stated finding may be the simplest: Europe can spend more money on defense, and it is doing so. Whether that money produces proportionally more defense capability depends on variables — agricultural supply chains, investment governance rules, intergovernmental workshare politics, demographic labor allocation — that defense budgets do not directly control.