About UCDP

The Uppsala Conflict Data Program (UCDP) is widely regarded as the world’s leading source of data on organised violence. Its definitions of armed conflict have become the global standard for how conflicts are systematically categorised and analysed. Data collection began in 1979, and in the mid-1980s, this was formalised under the name Conflict Data Project. It remains the longest-running active effort dedicated to collecting and maintaining conflict data. The program is a unique source of information for practitioners and policymakers.

The high-quality data produced by the UCDP:

• are systematically collected
• have global coverage
• are comparable across cases and countries
• have long time series which are updated annually

UCDP also operates and continuously updates its online database (UCDP Conflict Encyclopedia) on armed conflicts and organised violence, in which information on several aspects of armed conflict such as conflict dynamics and conflict resolution is available. This interactive database offers a web-based system for visualising, handling and downloading data, including ready-made datasets on organized violence and peacemaking, all free of charge.