This chapter introduces the book’s examination of the dynamics of far-right demonstration campaigns and their demobilisation. The chapter summarises the importance of these campaigns within the broader context of far-right movements and why they are illuminating cases for the study of demobilisation. It previews the book’s conceptual framework for understanding demobilisation, providing a theoretical basis for subsequent analysis. The chapter provides an overview of the empirical context for the study, drawing cases from Germany, Austria, and England between 1990 and 2020. Then, the chapter introduces the mixed-methods research design that is employed, combining both qualitative comparative analysis and process tracing to investigate these cases. The chapter concludes with the plan for the book, summarising the different chapters.