This historical study examines street demonstrations in France from the aftermath of the First World War through the upheavals of 1968. Covering demonstrations, protest marches, and episodes of political crisis, the work traces how public space became a central arena for social mobilization and political contestation in twentieth-century France. It considers the changing forms of collective action, the organizations and groups that shaped them, and the ways authorities responded to demonstrations in the street. The study is especially useful for understanding the relationship between protest, political culture, and state power across several decades of French history. By focusing on manifestations de rue, it connects labor unrest, student activism, anti-war mobilization, and broader movements of social dissent within a long historical framework. The book treats demonstrations not simply as isolated events, but as recurring practices through which citizens, movements, and institutions negotiated visibility, legitimacy, and authority in modern France.