"Western societies are open,diverse,organic and liberal,"he said."In a word,exposed."
"Despite this,until very recently,the US and its allies saw many of these actions as unconnected and only mildly irritating,"he said.
He said styles of political warfare,which include disinformation campaigns,cyber operations,intellectual property theft,coercion and propaganda - which military experts often call"grey zone"tactics - are calibrated so that they fall short of requiring a response.
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Western countries that prefer to see a clear boundary between war and peace often don't know how to push back.
Citing military scholars including former Australian defence official Ross Babbage,General Campbell said this had led to a"total mismatch between us and authoritarian states".
Professor Babbage,who is now a senior fellow at the Centre for Strategic and Budgetary Assessments,has said that western countries had to improve their"shallow"understanding of political warfare and develop a"coherent strategy"to resist them.