The Uppsala Conflict Data Program (UCDP) has recorded ongoing violent conflicts since the 1970s. The data provided is one of the most accurate and well-used data-sources on global armed conflicts and its definition of armed conflict is becoming a standard in how conflicts are systematically defined and studied.
About UCDP
UCDP/PRIO Armed Conflict Dataset
UCDP/PRIO Armed Conflict Dataset v.4-2012, 1946 – 2011
Content: a conflict-year dataset with information on armed conflict where at least one party is the government of a state in the time period 1946-2011. The most recent is version 4-2012.
Latest presentation of data: Themnér, Lotta & Peter Wallensteen, 2012. "Armed Conflict, 1946-2011." Journal of Peace Research 49(4).
Original citation for the data: Gleditsch, Nils Petter, Peter Wallensteen, Mikael Eriksson, Margareta Sollenberg, and Håvard Strand. 2002. “Armed Conflict 1946-2001: A New Dataset.” Journal of Peace Research 39(5).
Other recent presentations of the data: “Human Security Brief 2006” (Human Security Centre, University of British Columbia).
Latest update: 12 July 2012
Older versions
UCDP/PRIO Armed Conflict Dataset v.4-2011, 1946 – 2010
UCDP/PRIO Armed Conflict Dataset v.4-2010, 1946 – 2009
UCDP/PRIO Armed Conflict Dataset v.4-2009, 1946 – 2008
UCDP/PRIO Armed Conflict dataset v.4-2008, 1946 – 2007
UCDP/PRIO Armed Conflict dataset v.4-2007, 1946 – 2006
UCDP/PRIO Armed Conflict dataset v.4-2006, 1946 – 2005
Conflict list 1946 – 2005
UCDP/PRIO Armed Conflict dataset 1946 – 2004
Conflict list 1946 - 2004
Version History and Known Errata
Replication Data
Harbom, Lotta & Peter Wallensteen (2010) Armed Conflicts, 1946-2009. Journal of Peace Research 47(4): 501-509
UCDP/PRIO Armed Conflict Dataset, Version 4-2010, 1946-2009
Codebook UCDP/PRIO Armed Conflict Dataset, Version 4-2010
Harbom, Lotta & Peter Wallensteen (2009) Armed Conflicts, 1946-2008. Journal of Peace Research 46(4):577-587
UCDP/PRIO Armed Conflict Dataset, Version 4-2009, 1946-2008
Codebook UCDP/PRIO Armed Conflict Dataset, Version 4-2009
Harbom, Lotta, Erik Melander & Peter Wallensteen (2008) Dyadic Dimensions of Armed Conflict, 1946-2007. Journal of Peace Research 45(5): 697-710.
UCDP/PRIO Armed Conflict Dataset, Version 4-2008
Codebook UCDP/PRIO Armed Conflict Dataset, Version 4-2008
Harbom, Lotta & Peter Wallensteen (2007) Armed Conflict 1989-2006. Journal of Peace Research 44(5): 623-634
UCDP/PRIO Armed Conflict Dataset, Version 4-2007
Codebook UCDP/PRIO Armed Conflict Dataset, Version 4-2007
Harbom, Lotta, Stina Högbladh & Peter Wallensteen (2006) Armed Conflict and Peace Agreements. Journal of Peace Research 43(5): 617-631
UCDP/PRIO Armed Conflict Dataset Version 4-2006
Codebook UCDP/PRIO Armed Conflict Dataset Version 4-2006
Harbom, Lotta & Peter Wallensteen (2005) Armed Conflict and Its International Dimensions, 1946-2004. Journal of Peace Research 42 (5): 623-635
Armed Conflict Dataset, Version 3-2005
Codebook Armed Conflict Dataset, Version 3-2005
Version History and Known Errata
Eriksson, Mikael & Peter Wallensteen (2004) Armed Conflicts, 1989-2003. Journal of Peace Research 41(5)
Armed Conflict Dataset, Version 3.0
Codebook Armed Conflict Dataset, Version 3.0
Eriksson, Mikael, Peter Wallensteen & Margareta Sollenberg (2003) Armed Conflicts, 1989-2002. Journal of Peace Research 40(5): 593-607
Armed Conflict Dataset, Version 2.0
Codebook Armed Conflict Dataset, Version 2.0
Gleditsch, Nils Petter, Peter Wallensteen, Mikael Eriksson, Margareta Sollenberg, and Håvard Strand (2002) Armed Conflict 1946-2001: A New Dataset. Journal of Peace Research 39(5): 615-637
Armed Conflict Dataset, Version 1.1
Codebook Armed Conflict Dataset, Version 1.1
Click image for the UCDP Georeferenced Event Data
Latest News
Press release on the publication of UCDP’s report on states in armed conflict
A press release was issued on 27 December following the publication of UCDP’s annual report, States in Armed Conflict. This year the report includes an in-depth exploration of peace agreements. After the end of the Cold War, the 1990s and the first years of the 2000s saw numerous peace accords concluded, ending protracted conflicts such as those in Mozambique and Sudan. Since 2008 there has been a marked decline in the number of peace agreements, however, which is a cause of concern.
Press release (in Swedish)
Press release (in English)
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