It aims to understand how information is used as a tool for power projection and strategic competition, combining theoretical and empirical analyses. The work covers both traditional disinformation and lesser-studied phenomena like information suppression and the psychosocial vulnerabilities that enable manipulation. Through case studies of information campaigns in both wartime and peacetime, it highlights the security challenges posed by these narratives across varying geopolitical tensions. The book bridges realist and constructivist approaches, considering the roles of state and non-state actors, as well as domestic populations and international organizations. With empirical studies of initiatives by NATO, the UN, and the EU, the volume equips readers to address critical questions about the success, influence, and impact of weaponized narratives and the effectiveness of efforts to counter them.