This article explores the emergence of new military-strategic rationalities in relation to conceptions of hybrid warfare in the grey zone through a case study of Sweden’s reinstatement of total defence since 2015. Through a governmentality-inspired approach, I analyse what it means for the organisation of a new total defence when one of the main threats to be dealt with is daily antagonistic but highly ambiguous hybrid attacks. I illustrate how conceptions of an ambiguous strategic non-peace entails a move beyond war preparedness into urgent demands for an everyday active total defence that hinges on a ‘martialisation’ of civilian life. This in turn run the risk of challenging fundamental democratic principles and civil liberties. The analysis contributes to an increased understanding and uncovering of the politics made possible by a military-strategic rationality geared towards hybrid threats in the grey zone – which in the Swedish case has resulted in a historically specific version of total defence that builds on a highly diffused and rather extreme form of decentralised defence.