20thcentury american anti-submarinewarfare china coldwar congresses craven deterrence(strategy) espionage europe foreignrelations governmentpolicy greatbritain his015000his027030his027110his032000his037070 history historynorthatlantictreatyorganization johnp lawofthesea military militaryintelligence militarypolicy modern nuclearsubmarines nuclearwarfare nuclearweapons oceanengineering politicsandgovernment russia sea-power submarinewarfare theformersovietunion unitedstates