The project’s objective is to establish what factors and conditions facilitate the transformation of transnational ethnic ties into effective transmitters of organized ethnopolitical violence from one state to another. Based on the empirical universe of internal and internationalized internal ethnic conflicts in the Greater Eurasian space over the period of 1989 to 2018, this dataset is aimed at exploring statistical probabilities of diffusion processes as conditioned by a number of predictors linked to motivations and opportunities for mobilization of opposition groups that are part of such transnational ethnic networks. The unit of observation is a directed dyad-year with a source state experiencing an ongoing intrastate conflict and a target state being a host country for the same ethnic group or a kin ethnic group as the one involved in armed struggle in the source state. The dataset includes a number of variables covering type of source conflict, ethnic composition of target state, kin group characteristics in target state, as well as a range of controls. The coding is based on such sources as UCDP|PRIO armed conflict dataset (and its versions), Ethnic Power Relations (EPR) dataset family, Erica Forsberg's research on transnational ethnic kin along with data from Polity IV project, Minorities at Risk project, the World Bank, SIPRI and a variety of secondary sources on individual conflicts. The reported study was funded by RFBR and EISR according to the research project № 19-011-32013. Codebook for this version of the dataset is currently in Russian.