This chapter outlines the role of international organizations in battling terrorism. Cross-border cooperation became vital when transnational and global terrorist threats increased. Additionally, the range of legal powers between different international organizations is substantial. The chapter then looks at the counterterrorism efforts, challenges, and success within the United Nations (UN), Association of Southeast Nations (ASEAN), European Union (EU), and the North-Atlantic Treaty Organisation (NATO). It then notes the modalities of counterterrorism cooperation amongst international organizations. The European Court of Justice has shown its willingness to prioritize European interests over global interests, the chapter argues. Meanwhile, NATO-EU counter-terrorism cooperation has mainly improved with respect to areas such as maritime security and cybersecurity.
