civil defence
From Longman Dictionary of Contemporary EnglishRelated topics: Militarycivil defenceˌcivil deˈfence British English, civil defense American English noun [uncountable] PMthe organization of ordinary rather than military people to help defend their country from military attackExamples from the Corpuscivil defence• The country has made few preparations for civil defence.• These difficulties were greatly exacerbated by poor civil defence planning.