Procedures for the collection of refined and extended data on relatively large incidents of violence in European cultures over the past two centuries are described. The data have been coded for IBM cards and examined for some basic patterns. Initial results indicate international violence does not constitute a major portion of organized conflict; rather, more than half of all conflict occurs between social groups owing allegiance to the same polity. An examination of the political entities most frequently involved suggests that power and opportunity are the major predictors of involvement. Over time there has been little monotonic change in the issues causing conflict. During periods of lull there is a relative absence of conflicts over political reform, but colonial violence increases. Research on this project is still in its early stages. 32 pp.