0
5
10
15
20
25
30
1946 1951 1956 1961 1966 1971 1976 1981 1986 1991 1996 2001
Civil war
Imperial and colonial war
International war
USNSP, Fall 2009, Figure 1: Frequency of War, 1946-2004
The data are for "wars," violent armed conflicts which result in at least 1000 battle deaths over the duration of the
dispute for international wars, an average of at least 1000 battle deaths per year for imperial and colonial wars,
and at least 1000 military and civilian battle-related deaths per year for civil wars.
Source: Kristian S. Gleditsch, `A Revised List of Wars Between and Within Independent States, 1861-2002',
International Interactions, 30 (2004), pp. 231-62, plus additional correspondence with Gleditsch; & Mueller.