  We apply the reduced Google matrix method to analyse interactions between 95
terrorist groups and determine their relationships and influence on 64 world
countries. This is done on the basis of the Google matrix of the English
Wikipedia (2017) composed of 5416537 articles which accumulate a great part of
global human knowledge. The reduced Google matrix takes into account the direct
and hidden links between a selection of 159 nodes (articles) appearing due to
all paths of a random surfer moving over the whole network. As a result we
obtain the network structure of terrorist groups and their relations with
selected countries. Using the sensitivity of PageRank to a weight variation of
specific links we determine the geopolitical sensitivity and influence of
specific terrorist groups on world countries. We argue that this approach can
find useful application for more extensive and detailed data bases analysis.
