Since 1999, Europeans have successfully launched and developed a European Security and Defence Policy. What is the core of the European defence project and is there a roadmap according to which is it developing in order to tackle current security challenges ? What are the main drivers that lead the Europeans to act together and how effective are they in the field of the international security ? A French naval officier and a franco-British defence analyst jointly set about identifying problems between the main players and the avenues to explore in terms of European Defence.