The aim of this study is to examine the extent to which the end of the Cold War led to Europeanisation in the Common Security and Defence Policy (CSDP).The analysis takes into consideration previous studies on Europeanisation and its impact on the transformation of national security and defence, and attempts to account for the development of Europeanisation and related mechanisms. These mechanisms, which have been described as framing mechanisms and negative integration, incorporate all the major relevant factors identified here (i.e. a common Strategic Culture, new security identity, domestic political decision-making, industrial base and defence-spending decline) that contributed to the realisation of the CSDP. The relevance of these factors for CSDP Europeanisation is examined through an historical and empirical analysis, and the relationship between the CSDP and North Atlantic Treaty Organization (NATO) is also explored. This approach facilitates analysis of the debate concerning the emergence of the CSDP and throws light on the political shift that led European Union (EU) leaders to support the CSDP. Another aspect of this study is the empirical examination of the dynamics and limitations of the European defence sector. The changes which took place in this sector facilitated the emergence of the CSDP and are therefore analysed in the light of globalisation issues, economies of scale, economic crises, military autonomy, new security strategy and Research and Development (R&D) impact. This book will be of interest to students of European security, EU politics, defence studies and International Relations.