Summary of data sources for war data

Published: 1/16/2025

I was having a hard time comparing data sources listed in this Our World in Data article (there’s a lot of scrolling the way they laid things out). So I made a table that just condenses the info I need:

Data source	Conflicts Covered	Deaths Included	Years Included	Countries Included
UCDP	Armed conflicts: interstate, intrastate, extrastate, non-state, and one-sided violence At least 25 deaths during a year (based on most plausible estimate)	Total, combatant, and civilian deaths, due to fighting	1989 ongoing	Global
Project Mars	Conventional wars: interstate; de facto also intrastate and extrastate At least 500 deaths (based on highest plausible estimate) Primary combatants have differentiated militaries, and clear frontlines	Deaths of combatants, due to fighting	1800 — 2011 ongoing	Global
Militarized Interstate Events	Militarized interstate confrontations: interstate threats of force, display of force, use of force, war	Deaths of combatants, due to fighting	1816 — 2014 ongoing	Global
Correlates of War — Wars	Militarized interstate confrontations: interstate threats of force, display of force, use of force, war	Deaths of combatants, due to fighting, disease, and starvation	1816 — 2007 (extrastate, non-state) 1816 — 2010 (inter-state) 1816 — 2014 (intrastate) ongoing	Global
Correlates of War — Militarized Interstate Disputes	Militarized interstate disputes: interstate threats of force, display of force, use of force, war At least use of force threatened At least 1,000 deaths during a year for war	Deaths of combatants, due to fighting	1816 — 2014 ongoing	Global
Peace Research Institute Oslo	Armed conflicts: interstate, intrastate, and extrastate At least 25 deaths during a year	Deaths of combatants and civilians, due to fighting	1946 — 2008	Global
Conflict Catalog	Violent political conflicts: interstate, intrastate, extrastate, non-state and one-sided violence At least 32 deaths during a year	Total, combatant, and civilian deaths, due to fighting, disease, and starvation	1400 — 2000	Global

Proper Citation:

Bastian Herre (2023) - “How different measures capture how common and deadly conflicts are, and when to use which one” Published online at OurWorldinData.org. Retrieved from: 'https://ourworldindata.org/conflict-measures-how-do-researchers-measure-how-common-and-deadly-armed-conflicts-are' [Online Resource]