This thesis examines the discourse within both national and international strategies to analyse the processes through which the seabed becomes securitized, aiming to enhance the knowledge of Seabed Warfare. Additionally, the study underscores the significance of critical undersea infrastructure (CUI) concerning national security, geopolitics, and global power dynamics.      Strategies published by France, the United Kingdom, NATO, and the EU are examined through a critical analysis based on securitization theory, merged with the WPR method. The findings uncover the necessity for resilience to confront contemporary threats, emphasizing the need for comprehensive approaches, updated strategies, evolved situational awareness, enhanced information sharing, and the development of capabilities to enable measures at significant oceanic depths.      Finally, a discursive trend emerges, addressing threats necessitates unified action, whether through partnerships, alliances, or unions. Seabed Warfare is not an isolated problem within the maritime domain, it affects and requires cross-sectoral and multidimensional solutions.