This chapter examines what interests shaped the EU decision to tackle the challenges posed by the internalexternal nexus through an exploration of how changing threat perceptions and discourses within the EU are re-orientating CSDP. It explains the emergence of a European security continuum and its implications for Common Security and Defence Policy (CSDP) and a strategic approach to EU security. The chapter argues that the emergence of a European security continuum is re-orientating and reshaping CSDP at three levels. There are namely as the discursive level, the institutional level and the operational level. The chapter offers the opportunities and obstacles in coordinating civilian and military security actors, and the consequences for the EU's Comprehensive Approach (CA). The combination of integration and intervention fatigue in Europe has seen CSDP's original rationale being diluted, while the emerging internalexternal security nexus has shifted its focus towards different kinds of threats and operations.