<p>This research article examines France’s maritime security within the European Union’s (EU) framework, analysing whether the country’s naval ambitions align with broader European maritime security policies. As a historical naval power, France has maintained significant maritime capabilities and strategic interests, often advocating for autonomous military initiatives in line with the concept of “Grandeur”. The study explores the French role in shaping the EU’s maritime security policy, assessing its contributions to naval operations, strategic autonomy, and governance within EU institutions. By examining parliamentary papers, policy documents, military operations, and elite interviews with diplomatic, military and policy experts, the study offers insights into France’s ambition for maritime “Grandeur” and its impact on the EU’s evolving security architecture. The findings suggest that while France allegedly plays a leading role in European maritime security, tensions between national sovereignty and collective defence persist.</p>