"Engberg’s thoughtful empirical analysis shows that the EU’s military forces help to prevent and stop wars and preserve the peace in many world regions, and she shows whether, when, how, and why they are more or less likely to succeed."-- Jorge I. Domínguez, Harvard University, USA"When does the EU intervene militarily? In this book, well-placed practitioner-scholar Katarina Engberg studies the EU's experience in recent years. Distinguishing between driving and inhibiting factors, Engberg succeeds in conveying a deeper understanding of the EU's ability to act in increasingly multilateralised military operations for peace and security. The dissection of the interplay between the EU and determined local actors is central to this unique investigation."--Peter Wallensteen, Uppsala University, Sweden and University of Notre Dame, USA