Ralph Sundberg at the Uppsala Conflict Data Program (UCDP) sent me this video they put together displaying organized violence in Africa for a 21 year time period:
The data can be found here: http://ucdp.uu.se/ged/
Michael A. Allen is an Associate Professor of Political Science at Boise State University. His research focuses on international conflict, military alliances, and quantitative methods in international relations and comparative politics.