Political violence broadly defined, including guerrilla warfare, insurgency, terrorism, rebellion, revolution, rioting and civil war, can be distinguished in several ways, by the nature of the objectives; by the targets of attacks; by the organizational structure of groups and by the repertoire of actions. We will pay particular attention to tactical repertoires, how these are selected, how they depend on the repertoires' historical evolution and on the socio-poilitical context, their consequences, across different times and settings. This section, then, will develop comparisons across different forms of political violence, underlining similarities and identifying differences. For these reasons we welcome papers that address three main issues: (1) conceptual and theoretical thinking about forms of political violence, including refining existing definitions and typologies; (2) methodological reflections about how to deal with the subject matter and how to avoid the obstacles that have hindered previous research, from both a quantitative and qualitative perspective; (3) empirical analyses of different forms of political violence, in particular comparative studies encompassing different types of conflicts and/or countries. We welcome submissions that deal with actor groups such as social and protest movements, terrorist groups, insurgencies and other non-state armed formations.