This book examines the European Union’s (EU’s) norm and policy diffusion in relation to the Association of Southeast Asian Nations (ASEAN). By looking at the EU’ engagement with ASEAN in trade and non-traditional security, the book analyzes the drivers, processes, and effectiveness of the EU’s norm and policy diffusion in ASEAN and explains the EU’s foreign policy and power projection in the context of its relationship with ASEAN. In doing so, it helps to advance knowledge about the EU’ external relations and power projection in relation to regional political entities beyond its immediate borders and affords firsthand empirical material on how the EU’s power in global politics is impacted by external perceptions and responses in different policy fields. This book will be of key interest to scholars, students, and practitioners of EU foreign policy, EU–SEAN relations, and ASEAN politics and more broadly to European Studies, Comparative Regionalism, Asian Studies, and International Relations