Speakers: Martha Crenshaw and Kaitlyn Robinson

When and why do terrorist groups attack outside their local conflict ecosystems? In the last decade, the number of terrorist groups carrying out violence across international borders has increased. Many explanations of transnational terrorism focus on state-level factors that make some countries more attractive bases or targets for transnational attacks than others. However, state-centric explanations fail to consider the organizational characteristics of the groups carrying out this violence. Transnational terrorism demands significant resources, strength, and coordination as well as intent. At what point in a group’s campaign is it motivated and capable of carrying out attacks abroad? Why are some groups more likely to transition to transnational violence? In this paper, we study the conditions under which terrorist groups move from conducting attacks in their home country to carrying out violence across state borders. We employ data from the Mapping Militants Project to analyze which organizational traits are associated with this choice. Our findings emphasize the importance of group-level attributes in understanding broader patterns of terrorism and consider the implications for counterterrorism policies.