Europe’s military expansion is usually measured in budgets, force structures, equipment orders and recruiting targets. These measures do not show whether larger armed forces can be led effectively. Officers, non-commissioned officers, instructors and technical specialists come from institutions whose capacity cannot be expanded simply by authorising more posts or admitting more candidates. Military leadership formation requires qualified teachers, experienced serving personnel, academic provision, military practice, assessment, accommodation, digital systems and receiving units able to supervise newly qualified personnel. These resources operate on different timescales. The central issue is therefore not whether Europe possesses military academies. It is whether four European systems – those of Sweden, Denmark, Norway and the United Kingdom – can convert rising demand for personnel into additional professionally qualified leaders. They must do so without weakening educational standards and without transferring an unmeasured burden onto the units and instructors that are already required to sustain readiness.