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COW War Data, 1816 - 2007 (v4.0)

The new list of wars that will be included in the COW war databases is available. Non-state War data set (v4.0), Intra-state War data set (v4.0), Inter-state War data set (v4.0), and Extra-state War data set (v4.0) are now available.

COW Wars

Overview 

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. 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. 

 

Citation

We ask users of the data set to cite this data set as follows:

Sarkees, Meredith Reid and Frank Wayman (2010). Resort to War: 1816 - 2007. Washington DC: CQ Press.


Questions and Feedback

The war data sets are hosted by Meredith Sarkees, Global Women's Leadership in International Security, and Frank Wayman, University of Michigan-Dearborn, under the COW Data Set Hosting Program. In case of questions, they may be contracted by email at and .

 

The COW Typology of War: Defining and Categorizing Wars

This file was downloaded 4517 times.
Paper by Meredith Reid Sarkees that 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.”

PDF document icon COW Website - Typology of war.pdf — PDF document, 579 kB (593279 bytes)

COW War List

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The new list of COW Wars

PDF document icon CowWarList.pdf — PDF document, 227 kB (232918 bytes)

Non-State Wars

Previously, the Correlates of War (COW) Project has examined only wars that involved the government of a member of the interstate system (a state) in one form or another. The inclusion of non-state wars in the data presented here represents an attempt to broaden our understanding of war by including wars between or among non-state entities. Such entities include governments of other types of geopolitical units (GPUs), such as dependencies or non-state autonomous entities, that do not meet the criteria of system membership. They also might involve nonterritorial entities (NTEs) or non-state armed groups (NSAs) that have no defined territorial base.

Non-State War Data

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The Non-State War Database. Please note the distinction between the “-8” and “-9” codes as specified in the codebook.

text/comma-separated-values icon Non-StateWarData_v4.0.csv — text/comma-separated-values, 7 kB (7267 bytes)

Non-State Wars List

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The list of Non-State Wars.

PDF document icon Non-StateWarsList.pdf — PDF document, 92 kB (95054 bytes)

Non-State Wars Codebook

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The codebook v4.0 for the Non-State War Data set.

PDF document icon Non-StateWars_Codebook.pdf — PDF document, 83 kB (85691 bytes)

Intra-State Wars

The Correlates of War (COW) Project has utilized a classification of wars that is based upon the status of territorial entities, in particular focusing on those that are classified as members of the inter-state system (referred to as “states”). This dataset encompasses wars that predominantly take place within the recognized territory of a state, or intra-state wars.

Intra-State War Data (v4.1)

This file was downloaded 9171 times.
The Intra-State War Database. Please note the distinction between the “-8” and “-9” codes as specified in the codebook.

text/comma-separated-values icon Intra-StateWarData_v4.1.csv — text/comma-separated-values, 53 kB (54987 bytes)

Intra-State War Data codebook

This file was downloaded 7409 times.
The codebook v4.0 for the Intra-State War Data set.

PDF document icon Intra-StateWars_Codebook.pdf — PDF document, 96 kB (99231 bytes)

Inter-State Wars

The Correlates of War (COW) Project has utilized a classification of wars that is based upon the status of territorial entities, in particular focusing on those that are classified as members of the inter-state system (referred to as “states”). This dataset encompasses wars that take place between or among the recognized states, or inter-state wars.

Inter-State War Data

This file was downloaded 8677 times.
The Inter-State War Database. Please note the distinction between the “-8” and “-9” codes as specified in the codebook.

text/comma-separated-values icon Inter-StateWarData_v4.0.csv — text/comma-separated-values, 30 kB (31698 bytes)

Inter-State Wars List

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The list of Inter-State Wars.

PDF document icon Inter-StateWarsList.pdf — PDF document, 133 kB (136717 bytes)

Inter-State Wars Codebook

This file was downloaded 5816 times.
The codebook v4.0 for the Inter-State War Data set.

PDF document icon Inter-StateWars_Codebook.pdf — PDF document, 80 kB (82241 bytes)

Extra-State Wars

The Correlates of War (COW) Project has utilized a classification of wars that is based upon the status of territorial entities, in particular focusing on those that are classified as members of the inter-state system (referred to as “states”). This dataset encompasses wars in the middle category - wars that take place between a state(s) and a nonstate entity outside the borders of the state, or extra-state wars.

Extra-State War Data

This file was downloaded 4445 times.
The Extra-State War Database. Please note the distinction between the “-8” and “-9” codes as specified in the codebook.

text/comma-separated-values icon Extra-StateWarData_v4.0.csv — text/comma-separated-values, 22 kB (23068 bytes)

Extra-State Wars Codebook

This file was downloaded 3534 times.
The codebook v4.0 for the Extra-State War Data set.

PDF document icon Extra-StateWars_Codebook.pdf — PDF document, 103 kB (106163 bytes)