This book analyzes the leading role that French-British cooperation has in the ESDP and shows how these states depend on each other in this field. Janne Haaland Matlary has served as Deputy Foreign Minister, with special responsibility for Human Security, and thus has a wealth of experience to draw upon and insights not available to all academics.Coming from a non-UK source, it provides some interesting perspectives and gives a much fuller appreciation of cultural impact. The book presents a distinctive and original analytical approach to the study of the EU as an international security actor.This book shows how France and Britain are leaders in EU security and defence policy, and explains why both states need each other in this policy area. The lack of relevant military capacity in Europe today implies that the US favours a strong EU in this field.