This thesis aims to study the role, function, and responsibility of municipalities in the Swedish total defence during periods of heightened preparedness. The method used in this thesis is a qualitative text analysis, and the material consists of public documents from state actors. The research question formulated is as follows: What role, function, and responsibility are municipalities expected to have within the future total defence during periods of heightened preparedness? To answer the research question, resilience has been used as a theoretical framework. The results show that municipalities are expected to take on a proactive role by working with anticipation and identification, as well as by preventing, mitigating, and preparing for crises. Additionally, municipalities are expected to have an adaptive capability and act reactively by implementing measures and restoring society to normalcy. Furthermore, although the concept of resilience is not explicitly mentioned in the analyzed documents, it is evident that municipalities are expected to have a role, function, and responsibility characterized by resilience within the framework of future total defence. By contributing new knowledge and insights in this area, the study aims to fill the knowledge gaps that previous research has not addressed, while also aspiring to provide ideas for further research and development in the field of total defence and municipal resilience.