In an era where global defense dynamics are increasingly influenced by the interplay of strategic management, geopolitics, and ocean politics, this study explores the pivotal role these elements play in shaping contemporary defense strategies. It highlights the necessity of a multidisciplinary approach that incorporates strategic management theories and a deep understanding of maritime security dynamics to navigate the complex geopolitical landscape. By analyzing the significance of geographical considerations and maritime domains, alongside case studies such as the South China Sea dispute and the annexation of Crimea, the paper underscores the strategic importance of maritime security. Furthermore, it identifies emerging trends and technologies as critical to future defense planning, advocating for adaptation, innovation, and enhanced international collaboration to tackle modern security challenges. Recommendations for policymakers, strategists, and scholars emphasize the integration of strategic and geopolitical insights, preparation for non-traditional threats, and the significance of ongoing research in defense studies. This comprehensive analysis aims to inform the development of innovative defense strategies that are responsive to the dynamic and interconnected nature of global security challenges.