Primary source digital collections online
Africa
Histoire de la colonisation du Belge http://www.cobelco.info/
Congo Decolonization (US State Department Historian) https://history.state.gov/milestones/1961-1968/congo-decolonization
Rwanda Radio Transcripts, Montreal Institute for Genocide and Human Rights Studies
http://www.concordia.ca/research/migs/resources/rwanda-radio-transcripts.html
Genocide Archive of Rwanda http://www.genocidearchiverwanda.org.rw/index.php/Welcome_to_Genocide_Archive_Rwanda
The US and the Rwandan Genocide (National Security Archive at GWU) https://nsarchive2.gwu.edu//NSAEBB/NSAEBB53/index.html
Sudan (United Nations documents) https://peacekeeping.un.org/mission/past/unmis/
Human Rights Watch (search "Sudan") in Reports https://www.hrw.org/publications
Asia
Vietnam War (Wilson Center) https://digitalarchive.wilsoncenter.org/collection/87/vietnam-war
Vietnam Virtual Archive (Texas Tech) https://www.vietnam.ttu.edu/virtualarchive/
Cambodia Genocide Program (Yale: documents, photos, database) https://gsp.yale.edu/case-studies/cambodian-genocide-program
China's Cultural Revolution (Wilson Center Digital Archive) https://digitalarchive.wilsoncenter.org/collection/211/china-s-cultural-revolution-1966-1976
Europe: Ireland and The Troubles
Times of London Digital Archive is an invaluable source for information on specific events during the period of the troubles. It may be interesting to compare coverage in the Boston Globe, whose audience may have been more sympathetic to the IRA.
UK National Archives: selected documents on Northern Ireland from the Prime Minister's cabinet
Europe: Yugoslav/Kosovo War 1991-1995
Insider's Guide to the criminal tribunal for the former Yugoslavia at the Hague (book, available at the NU School of Law)
International Criminal Tribunal Court Records (a huge archive, searchable in English; see this article for an overview of the materials.)
To End A War, diplomat Richard Holbrooke's account of brokering the Dayton Accords. (book available at Snell Library)
Latin America
See Primary source collections on Latin American history : documents, photographs, maps, statistics, and other resources in English and vernacular languages.
Middle East
1948 Arab-Israeli Conflict (Mass Humanities) key documents http://masshumanities.org/ph_key-documents-for-understanding-the-arab-israeli-conflict/
Key documents from 1922 forward on Palestine (Yale Law) http://avalon.law.yale.edu/subject_menus/mideast.asp
Nashriya: Digital Iranian History (University of Manchester-in Farsi) http://www.library.manchester.ac.uk/search-resources/manchester-digital-collections/digitisation-services/projects/nashriyah-digital-iranian-history//
The Speeches of Ayatollah Khomeini http://www.bbc.com/persian/revolution/khomeini.shtml
National Archives selected documents on Iran Hostage Crisis https://www.archives.gov/research/foreign-policy/iran-hostage-crisis
Russia
Soviet Afghan War (Wilson Center ) https://digitalarchive.wilsoncenter.org/collection/76/soviet-invasion-of-afghanistan
Afghanistan Materials (University of Nebraska) includes Afghan Times http://digitalcommons.unl.edu/afghanenglish/
Russian Revolution (EuroDocs BYU) https://eudocs.lib.byu.edu/index.php/Russian_Revolution,_Civil_War_and_USSR_1917-1991
South and Southeast Asia
The Road to Partition (UK National Archives) http://www.nationalarchives.gov.uk/education/resources/the-road-to-partition/