Our World
in Data
Data

Countries where interstate or intrastate wars took place

See all data and research on:
War & Peace

What you should know about this indicator

  • '1' indicates that there was a war event in the given country. '0' indicates that there was no war event in the given country.
  • A state-based war is a conflict between two armed groups, at least one of which is a state, that causes at least 1,000 deaths during a year. This includes combatant deaths due to fighting, disease, and starvation.
Countries where interstate or intrastate wars took place
At least one interstate, intrastate, or extrasystemic war event took place in this country in a given year.
Source
Chupilkin and Kóczán (2022); Correlates of War - Wars (2020) – processed by Our World in Data
Last updated
September 21, 2023
Date range
1816–2010

Related research and writing

Featured image for how researchers measure how common and deadly conflicts are. Stylized stacked bar chart, maps, and line chart indicating the frequency and deadliness of conflicts.

How different measures capture how common and deadly conflicts are, and when to use which one

Bastian Herre

Sources and processing

This data is based on the following sources

Retrieved on
November 29, 2023
Retrieved from
https://www.ebrd.com/sites/Satellite?c=Content&cid=1395309927403&d=&pagename=EBRD%2FContent%2FContentLayout&rendermode=live%3Fsrch-pg%3Fsrch-pg%3FfilterCountry%3DJordan%3FfilterCountry%3DPoland%3FfilterSector%3DEnergy
Citation
This is the citation of the original data obtained from the source, prior to any processing or adaptation by Our World in Data. To cite data downloaded from this page, please use the suggested citation given in Reuse This Work below.
Chupilkin, Maxim, and Zsóka Kóczán. 2022. “The economic consequences of war: Estimates using synthetic controls.” EBRD Working Paper No. 271.

The COW Project introduced COW Wars v4.0, 1816-2007 in 2010. The paper “The COW Typology of War: Defining and Categorizing Wars (Version 4 of the Data)” by Meredith Reid Sarkees gives an overview of the COW war typology, the descriptions of the basic variables, coding rules and some of the changes since “Resort to Arms.” In March 2010, the New COW War List was released. On June 30, 2010, the Non-State War Data (v4.0) became available. On October 28, 2010, the Intra-State War Data (v4.0) was released and on April 6, 2020 the Intra-State War Data (v5.1) became available online. On March 1, 2011, the Inter-State War Data (v4.0) became available online. Finally, we released the Extra-State War Data (v4.0) on December 8, 2011.

Retrieved on
September 21, 2023
Retrieved from
https://correlatesofwar.org/data-sets/cow-war/
Citation
This is the citation of the original data obtained from the source, prior to any processing or adaptation by Our World in Data. To cite data downloaded from this page, please use the suggested citation given in Reuse This Work below.
Sarkees, Meredith Reid and Frank Wayman (2010). Resort to War: 1816 – 2007. Washington DC: CQ Press.

How we process data at Our World in Data

All data and visualizations on Our World in Data rely on data sourced from one or several original data providers. Preparing this original data involves several processing steps. Depending on the data, this can include standardizing country names and world region definitions, converting units, calculating derived indicators such as per capita measures, as well as adding or adapting metadata such as the name or the description given to an indicator.

At the link below you can find a detailed description of the structure of our data pipeline, including links to all the code used to prepare data across Our World in Data.

Read about our data pipeline
Notes on our processing step for this indicator

We have used Chupilkin and Kóczán data, together with CoW data, to identify the location of wars.

Reuse this work

  • All data produced by third-party providers and made available by Our World in Data are subject to the license terms from the original providers. Our work would not be possible without the data providers we rely on, so we ask you to always cite them appropriately (see below). This is crucial to allow data providers to continue doing their work, enhancing, maintaining and updating valuable data.
  • All data, visualizations, and code produced by Our World in Data are completely open access under the Creative Commons BY license. You have the permission to use, distribute, and reproduce these in any medium, provided the source and authors are credited.

Citations

How to cite this page

To cite this page overall, including any descriptions, FAQs or explanations of the data authored by Our World in Data, please use the following citation:

“Data Page: Countries where interstate or intrastate wars took place”, part of the following publication: Bastian Herre, Lucas Rodés-Guirao, Max Roser, Joe Hasell and Bobbie Macdonald (2024) - “War and Peace”. Data adapted from Chupilkin and Kóczán, Correlates of War. Retrieved from https://ourworldindata.org/grapher/countries-where-interstate-or-intrastate-wars-took-place [online resource]
How to cite this data

In-line citationIf you have limited space (e.g. in data visualizations), you can use this abbreviated in-line citation:

Chupilkin and Kóczán (2022); Correlates of War - Wars (2020) – processed by Our World in Data

Full citation

Chupilkin and Kóczán (2022); Correlates of War - Wars (2020) – processed by Our World in Data. “Countries where interstate or intrastate wars took place” [dataset]. Chupilkin and Kóczán, “Wars on territory”; Correlates of War, “War Data v4.0”; Correlates of War, “War Data v5.1” [original data]. Retrieved July 27, 2024 from https://ourworldindata.org/grapher/countries-where-interstate-or-intrastate-wars-took-place