Outsourcing, a prevalent business strategy rooted in cost-efficiency, is a widespread practice across various industries. While this approach has proven effective in reducing expenses and enhancing overall efficiency, its application to the critical realms of war and security poses distinct challenges. Unlike profit-driven sectors, the defense landscape operates on a fundamentally different paradigm. This chapter delves into the intricate rationale underpinning the outsourcing of war and security functions. It scrutinizes the economic, professional, and political justifications that drive organizations to externalize these essential functions, while also shedding light on potential pitfalls and far-reaching implications. By exploring the multifaceted dimensions of outsourcing in the context of war and security, this analysis aims to provide a comprehensive understanding of the motivations and consequences inherent in the strategic decision to outsource such pivotal aspects of national and international stability.