A key source of data on the military strength of countries. Includes force levels, organization, and number and types of equipment. Also national and regional data on military expenditures and arms sales.

A compendium of data and analysis in the areas of security and conflicts; military spending and armaments; and non-proliferation, arms control and disarmament. Online and print: REF JX 1974 .S13

Foreign military sales and military assistance facts, from the U.S. Dept. of Defense, DSCA. Look under "Resources/Publications".

Data on a range of conflict issues.

COW is a free database offering data sets on the history of war and international conflicts. Click on "Related Data" for links to additional sites of conflict-related data.

Statistics available from 1945 to the present

Datasets on organized violence and peacemaking, including data on armed conflicts, both internal and external, state and non-state, 1946 to the present.

Data sets for forcibly displaced populations, major episodes of political violence, state failure, high casualty terrorist bombings, regime authority characteristics and transitions, coups d'etats, state fragility index and conflict in India.

High quality record of casualties over the last six centuries. In print only.

From the U.S. Arms Control and Disarmament Agency. Publication ceased with 2021 ed.

Defense Security Cooperation Agency (DSCA), includes data regarding foreign military sales, foreign military construction sales and military assistance facts.

Excellent source for WWII stats, including order of battle, command structures and campaigns.

ACLED collects real-time data on the locations, dates, actors, fatalities, and types of all reported political violence and protest events around the world.