The German Research Foundation (DFG) has granted three-year funding for an international net-work in the field of classics / ancient history. The network members investigate the impact of internal conflicts on ancient societies. The aim of the project is threefold: (a) The network intends to further our historical understanding of civil war as a crucial factor of sociocultural development in antiquity at large by developing conceptually new approaches to the phenomenon in question; (b) to advance a methodologically sound and comprehensive reexamination of the relevant source material; (c) and to lay the groundwork for future research by strengthening the cultural studies perspective on civil war. A joint publication by the network members will be the enduring result of the project. The publication will combine the advantages of a source reader with those of programmatic articles and in-depth ‘Companion’ papers: In the form of problem-oriented essays, the contributions provide close-readings of a wide range of selected sources (literary, archaeological, epi-graphic, numismatic, papyrological). The essays will be organized in three sections: Classical and Hellenistic Greece; Roman Republic / Early Principate; and High Empire / Late Antiquity. Each network member is invited to contribute to one of these sections. In order to achieve the goal of a joint publication, the network members will meet on three occasions over a period of three years: Three two-day conference correspond to the three sections of the publication. The network has strong potential for follow-up projects and provides a valuable point of departure for academic exchange beyond the disciplinary boundaries of classical studies.