Under shifting global power dynamics, Europe faces a dual challenge: Russia’s protracted confrontation with Europe and growing questions over the reliability of US security guarantees. These pressures expose Europe’s vulnerability and demand accelerated defence self-reliance. While recent initiatives have aimed at boosting budgets, industrial modernisation, and procurement, deterrence requires more than resources. The critical gap lies in the capacity to transform investments into deployable capabilities and to engage society across the continent. Two priorities are highlighted: establishing a permanent European multi-domain command-and-control structure to integrate land, maritime, air, space, and cyber components into coherent operational planning, coordinated with political and interagency governance, and strengthening civilian preparedness and resilience; ensuring that governments, private actors, and societies can respond effectively to crises and hybrid attacks. Together with industrial modernisation, these measures provide the foundation of Europe’s strategic autonomy and the most immediate steps towards credible deterrence and resilience in a volatile international environment.