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The term hybrid warfare has been widely analyzed by scholars, policymakers and commentators since Russia occupied Crimea in March 2014. The topic has ceased to be a subject only studied by military strate-gists, but has entered the wider policy domain as a significant security challenge for the West. This article seeks to place the debate about hybrid warfare in a broader analytical and historical context and summarizes discussion to date on this and related strategic concepts. The Russian approach to hybrid warfare as demonstrated by operations in Ukraine is a particular focus for discussion.