Employing the Foucauldian term ‘conduct’, this article explores how social resilience and morale became a target of state intervention in Denmark during the Cold War. ‘Psychological defence’ was a Cold War phenomenon designed to bring an imagined future war into a space of control as well as a tool for the authorities’ exercise of power in case another world war became a reality. Advocating a methodological internationalism, the article analyses how the concept of psychological defence travelled from Sweden to Denmark via Norway and NATO, and in a complex process of translation, mixing and hybridization was adapted and appropriated to Danish security policy conditions, preparedness culture, and historical experiences. Ultimately, psychological defence was replaced with a more practical or even cynical approach to public information and media preparedness, even if the objectives remained the same. The article employs source material from Danish, Swedish, and NATO archives and combines Scandinavian Cold War history with media history and the history of knowledge. [ABSTRACT FROM AUTHOR]