# Content This dataset contains territorial claims across the entire interstate system between 1816-2001 and includes information on participants, dates, the significance of the claimed territories, and militarization of these claims. A territorial claim is defined as explicit contention between two or more nation-states claiming sovereignty over a specific piece of territory. Official government representatives (i.e., individuals who are authorized to make or state foreign policy positions for their governments) must make explicit statements claiming sovereignty over the same territory. Our goal is to identify cases where nation-states have disagreed over specific issues in the modern era, as well as measuring what made those issues valuable to them and studying how they chose to manage or settle those issues. The Issue Correlates of War (ICOW) project does not endorse official positions on any territorial claim. Inclusion/exclusion of specific cases, and coding of details related to those cases, follows strict guidelines presented in the project's coding manuals. # Acknowledgements This data was collected by Professor Paul Hensel of the University of North Texas and his research assistants.