As Latin American countries work toward leaving military regimes well behind, the current governing of defense in the hands of civilians unveils a series of challenges for democratically elected leaders. This article analyzes the case study of Chile's contemporary defense sector and its policymaking after three decades of evolving civil-military relations. The research focuses particularly on the Estrategia Nacional de Seguridad y Defensa (ENSYD), a government-led policy program launched in 2013 that failed to achieve its goals and faced extensive opposition, for example, in its human security approach to understanding security threats. The article explores and builds on civil-military relations literature and suggests the governance of defense as a concept to study further the constant governing processes by which institutions assume different beliefs and interests in relation to how policies are planned and executed.Mientras que los países latinoamericanos consolidan esfuerzos para dejar a los regímenes militares en el pasado, la gobernanza del sector de la defensa por parte de civiles presenta una serie de retos para las autoridades elegidas de manera democrática. Este artículo analiza el caso de estudio de las políticas públicas de defensa en Chile tras 30 años de evolución de las relaciones cívico-militares. La investigación se enfoca particularmente en la Estrategia Nacional de Seguridad y Defensa (ENSYD), una política presentada por el gobierno en 2013 cuyo éxito programático fue truncado y objeto de amplia oposición, por ejemplo, en cuanto al uso de un enfoque de seguridad humana para enfrentar las amenazas a la seguridad. El artículo explora y construye sobre la literatura de relaciones cívico-militares y propone a la gobernanza de la defensa como un concepto para estudiar los constantes procesos de gobierno en que varias instituciones expresan motivos e intereses particulares en el planeamiento y ejecución de tales políticas. a human-oriented understanding. Through the ENSYD, President Piñera kept one of his campaign promises for the defense sector and intended for it to be a state policy for the country's security matters thereafter, but its unveiling marked a watershed moment in what was up to then a solemn tradition of consensual defense policymaking in the country (Robledo, 2012). Multiple sectors in government, civil society, and the armed forces severely criticized the policy for its novel framework and viewed it with skepticism and reluctance.The leader of the Senate, Camilo Escalona, a member of the opposition socialist party and an influential figure of the center-left coalition Concertación, disapproved of how the ENSYD proposed a new, wider conceptualization of security. He was especially unconvinced of how "new threats" to security, such as organized crime, energy vulnerability, human trafficking, and other "internal" menaces, were understood in this new approach. To Escalona, this rationale went against Chile's successful experience over the last two decades in keeping the armed forces away...