Empirical literature on civil war has demonstrated the benefits of using disaggregated data while exploring the influence of geography on intrastate conflicts. This paper goes further in exploring the border between political and geographical sciences by assessing the link between accessibility and the location of internal armed conflicts. Our work is aimed at finding whether poorly accessible parts of a country are more prone to civil war than any other part. To test this hypothesis, we deploy a three-step research design. First, regarding the pivotal role of the capital city previously demonstrated, we evaluate the importance of bringing a country’s urban structure into analysis using Zipf’s law as an indicator of urban hierarchy. Second, we model the influence of cities over space using a gravity model of spatial allocation. Finally, we use network analysis in order to assess the accessibility of cities by road and to evaluate whether this factor influences the location of civil conflicts. Our preliminary results suggest a link between multipolar urban hierarchies and separatism. This paper constitutes a good demonstration of how conflict studies can benefit from an interdisciplinary approach. Finally, this research highlights the conflict-resolution potential of a rather politically-insensitive issue such as spatial planning.