This dataset was part of a collaborative project between the Department of Peace and Conflict Research at Uppsala University and the Centre for the Study of Civil War at PRIO. Until 2002 the conflict data from Uppsala University had only covered the years from 1989 and onwards. Our joint project extended the armed conflict list back to 1946.
For newer versions of the dataset, please see the Uppsala Conflict Data Program pages.
For the record, and for replication purposes, we have preserved copies of the previous versions up until 2009. The earlier versions of the dataset that continue to be listed here have been featured in annual updates published in the Journal of Peace Research:
- 2002: Gleditsch et al., 'Armed Conflict 1946-2001: A New Dataset'.
- 2003: Eriksson et al., 'Armed Conflict, 1989-2002'.
- 2004: Eriksson & Wallensteen, 'Armed Conflict, 1989-2003'.
- 2005: Harbom & Wallensteen, 'Armed Conflict and Its International Dimensions, 1946–2004'.
- 2006: Harbom, Högbladh & Wallensteen, 'Armed Conflict and Peace Agreements'.
- 2007: Harbom & Wallensteen, 'Armed Conflict, 1989-2006'.
- 2008: Harbom, Melander & Wallensteen, 'Dyadic Dimensions of Armed Conflict, 1946−2007'.
- 2009: Harbom & Wallensteen, 'Armed Conflict, 1946-2008'.
The updates include some changes in the data published for previous years, and the database is adjusted accordingly. A complete list of these changes is found in the document Version History and Known Errata.
Work on the dataset was supported by The World Bank's Development Economics Research Group as part of its project on The Economics of Civil War, Crime, and Violence. More detailed credits – intellectual as well as financial – can be found in the first footnote of Gleditsch et al. (2002), 'Armed Conflict 1946–2001: A New Dataset'.
The dataset has been widely used since it was first made available, both by researchers and policy makers, e.g.: