- Jolyon Howorth
This chapter examines the European Union's efforts since the late 1990s to become an increasingly autonomous security and defence actor, albeit one that focused overwhelmingly on overseas missions connected with crisis management and embryonic nation building. It first provides an overview of EU security and defence in the context of international relations before discussing the theoretical approaches to the emergence of the EU security and defence policy. It then considers the factors that drove the EU to tackle new and significant security challenges, along with the implications for international relations of the EU's overseas interventions, both as a military and as a civilian crisis management entrepreneur. It also explores the ramifications of the Treaty of Lisbon, the 2016 European Global Strategy, and Brexit for the further development of Europe's security and defence policy, in the context of new and serious security threats in its Southern and Eastern neighbourhoods.