The Global Terrorism Database (GTD) is a freely available open-source dataset maintained by the National Consortium for the Study of Terrorism and Responses to Terrorism (START) at the University of Maryland. It provides comprehensive information on both domestic and international terrorist incidents worldwide from 1970 to the present, with ongoing annual updates. The database includes detailed attributes for each event—such as location, perpetrators, targets, weapons, and casualties—and is designed to support research on patterns, trends, and the broader dynamics of terrorism over time.