About UCDP

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.

More about UCDP

Contact UCDP

Lecture on Peace Research by Peter Wallensteen

The Department has recorded a lecture on the origins and developments of peace research globally and at Uppsala University with Professor Peter Wallensteen.

Watch the lecture.

Data Publications

1. States in Armed Conflict, our in-house publication summarises all other publications and gives an overview of the data. Order
2. UCDP Conflict Encyclopedia (UCDP Database), our most variable-rich source covering the 1975 –2014 period (updated yearly).
3. Journal of Peace Research publishes an article with a yearly update of our data.
4. The SIPRI yearbook publishes a yearly update of our Major Armed Conflict data.
5. The Human Security Report presents our categories non-state conflicts and one-sided violence. The report also gives absolute fatality numbers for all types of conflict. 
 


1. States in Armed Conflict

Order

Description

The in-house publication States in Armed Conflict (Department of Peace and Conflict Research, Uppsala University) was publsihed between 1987 and 2012. The booklet contains information on current numbers of armed conflicts, project history, definitions of variables, descriptions of methods and sources. The data published in the Journal of Peace Research and in the SIPRI yearbook are included as well as a list of all armed conflicts active after 1946 and a table showing the dyadic activity after 1989.

States in Armed Conflict 2011 is available for order. States in Armed Conflict includes information on the incompatibility, opposition organisation, year, battle deaths, intensity level, location, region, year formed, year joined, year entered, warring parties, and change in intensity from previous year.

Threshold for inclusion

All conflicts that result in at least 25 battle-related deaths in one year are included. The table of Major armed conflicts includes all conflicts that have resulted in 1000 deaths in one year and which continues to have at least one battle-related death in the following years.

Temporal domain

Data on a conflict level 1946 – 2011, on a dyadic level 1989-2011. 

  


2. UCDP Conflict Encyclopedia (UCDP Database)

Description

In 2003 the project launched a database of armed conflict on the Internet. The database covers all the regular UCDP variables but also presents some new variables such as conflict onset, conflict ending, secondary support, troop size, negotiation, third party involvement and peace agreement. Conflict descriptions and links to relevant documents are also available.

Threshold for inclusion

All conflicts that result in at least 25 battle-related deaths in one year.

Temporal domain

1975 - 2014 (updated yearly).

UCDP Conflict Encyclopedia (UCDP Database)


3. Journal of Peace Research

Description

The Journal of Peace Research (Sage) has been publishing our data in an article since 1993. The article presents graphs and conflict tables extracted from the Post-World War II dataset and the UCDP Conflict Encyclopedia (UCDP Database).

The data includes information on active conflicts and opposition organisations, intensity level and active years.

Threshold for inclusion

All conflicts that result in at least 25 battle-related deaths in one year.

Temporal domain

1946 - 2014 (updated yearly). 

Journal of Peace Research


4. SIPRI Yearbook

Description

SIPRI Yearbook (Oxford University Press: Oxford) has published our data on Major Armed Conflicts since 1988. The article includes information on the incompatibility, year formed, year joined, year entered, warring parties, battle deaths and change in intensity from previous year. The data published in the SIPRI yearbook are also found in the FIRST database.

Threshold for inclusion

All conflicts that have resulted in at least 1000 battle-related deaths in a single year.

Once a conflict has reached the threshold it continues to appear in the annual tables of conflicts until the contested incompatibility has been resolved and/or until there is no recorded use of armed force, resulting in deaths, between the parties and concerning the same incompatibility during the year.

Temporal domain

The table includes all conflicts active in the published year. 

SIPRI Yearbook


5. The Human Security Report

Description

Data on UCDP non-state conflict (conflict between two groups, neither of which is the state) and one-sided violence by states or organised groups against civilians (such as massacres and genocide) are regularly published as part of the Human Security Report. Furthermore, the Human Security Report publishes specific fatality figures also for state-based armed conflicts and have featured information from the UCDP Conflict Termination Dataset.

The datasets and codebooks are available on the UCDP Datasets page. Updated descriptive information on cases is available in the UCDP Conflict Encyclopedia (UCDP Database).

Threshold for inclusion

At least 25 deaths in battle (for state-based and non-state conflict) or in one-sided violence in a calendar year.

Temporal domain

Non-state conflict: 2002-present
One-sided violence: 1989-present
State-based conflict: (incidence) 1946-present, (termination) 1946-present, (fatality estimates) 2002-present 

The Human Security Report

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