ACLED is a disaggregated conflict collection, analysis and crisis mapping project.

The Correlates of War project includes quantitative data on topics within international relations including trade, religion, alliances, militarization, colonialism, and conflict.

Aims to create an up-to-date, online tracker of all cases and robust allegations of corruption in the global arms trade.

From the Council on Foreign Relations.

Information on terrorist events around the world from 1970 through 2017. You must have a subscription to access data.

HDX is a platform for sharing data collected across different crises, locations, and organisations.

by Barbara Salazar Torreon, 2017. Congressional Research Service

Contains information for all crises occurring during the 1918-2015 period. The datasets include information on 476 international crises and 1052 crisis actors. There are 35 protracted conflicts.

This site provides access to the datasets used by authors of articles appearing in the Journal of Peace Research since 1998.

From IISS. Military capabilities and defense economics worldwide. 1961-present.

Project to gather data on all U.S. military interventions from the Fletcher School's Center for Strategic Studies.

The Sexual Violence in Armed Conflict (SVAC) Dataset measures reports of the conflict-related sexual violence committed by armed actors (state forces, pro-government militias and rebel groups) during the years 1989-2009.

The Social Conflict Analysis Database (SCAD) includes protests, riots, strikes, inter-communal conflict, government violence against civilians, and other forms of social conflict not systematically tracked in other conflict datasets. SCAD currently includes information social conflicts from 1990-2017, covering all of Africa and now also Mexico, Central America, and the Caribbean.

SIPRI collects data on arms transfers, military expenditures, peace operations, and the arms industry.

Data on organized violence and the oldest ongoing data collection project for civil war, with a history of almost 40 years.

Annual military expenditures, arms transfers, armed forces, selected economic data, and relative indicators consisting of pertinent military-economic ratios.

Repository of micro-level, subnational event data on armed conflict and contention around the world that combines multiple open-source data collections in one comprehensive electronic archive. Currently includes data on armed conflict and contention from 156 countries (1969-2017), from 21 data sources, including both large data collections and individual scholars.