Europe's defence debate changed materially when ammunition shortages stopped being an abstract readiness concern and became a constraint on support for Ukraine and national stockpiles.
Rheinmetall's 2024 decision to build a new ammunition plant at Unterlüß was one of the clearest industrial responses: capital committed before full demand certainty in order to create domestic capacity.
The factory internalised the supply chain
Rheinmetall planned artillery shells, explosive production and components for rocket artillery at one site, with domestic value added rising over the ramp-up period.
That design reduced reliance on imported intermediate inputs and made the facility part of Germany's security infrastructure rather than only an export factory.
Defence economics shifted from efficiency to assured availability
In peacetime procurement, idle capacity looks expensive. In a security crisis, the option value of being able to increase output quickly becomes economically and strategically significant.
The Unterlüß investment reflected that change in risk weighting. Germany was effectively paying more for resilience because the cost of shortage had risen.
The plant became a benchmark for whether European rearmament could be industrialised
Announced defence budgets only matter if suppliers can turn them into equipment and munitions. Capacity, skilled labour and component supply therefore became the bottlenecks.
Werk Niedersachsen was important because it translated political demand into a timed production ramp with measurable annual output.