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- Double-Cross_System abstract "The Double-Cross System, or XX System, was a World War II anti-espionage and deception operation of the British military intelligence arm, MI5. Nazi agents in Britain – real and false – were captured, turned themselves in or simply announced themselves and were then used by the British to broadcast mainly disinformation to their Nazi controllers. Its operations were overseen by the Twenty Committee under the chairmanship of John Cecil Masterman; the name of the committee comes from the number 20 in Roman numerals: "XX" (i.e. double crosses).The policy of MI5 during the war was initially to use the system for counter-espionage. It was only later that its potential for deception purposes was realised. Agents from both of the German intelligence services, the Abwehr and Sicherheitsdienst (SD), were apprehended. Many of the agents who reached British shores turned themselves in to the authorities. Still others were apprehended when they made elementary mistakes during their operations. In addition, some were false agents who had tricked the Germans into believing they would spy for them if they helped them reach England (e.g. Treasure, Fido). Later agents were instructed to contact agents in place who, unknown to the Abwehr, were already controlled by the British. The Abwehr and SD sent agents over by a number of means including parachute drops, submarine and travel via neutral countries. The last route was most commonly used, with agents often impersonating refugees. After the war it was discovered that all the agents Germany sent to Britain had given themselves up or had been captured with the possible exception of one who committed suicide.".
- Double-Cross_System wikiPageExternalLink 9781408819906.
- Double-Cross_System wikiPageID "33090".
- Double-Cross_System wikiPageRevisionID "590064624".
- Double-Cross_System hasPhotoCollection Double-Cross_System.
- Double-Cross_System subject Category:Double_Cross_System.
- Double-Cross_System subject Category:Espionage_techniques.
- Double-Cross_System type Ability105616246.
- Double-Cross_System type Abstraction100002137.
- Double-Cross_System type Cognition100023271.
- Double-Cross_System type EspionageTechniques.
- Double-Cross_System type Know-how105616786.
- Double-Cross_System type Method105660268.
- Double-Cross_System type PsychologicalFeature100023100.
- Double-Cross_System type Technique105665146.
- Double-Cross_System comment "The Double-Cross System, or XX System, was a World War II anti-espionage and deception operation of the British military intelligence arm, MI5. Nazi agents in Britain – real and false – were captured, turned themselves in or simply announced themselves and were then used by the British to broadcast mainly disinformation to their Nazi controllers.".
- Double-Cross_System label "Double-Cross System".
- Double-Cross_System label "Sistema Double Cross".
- Double-Cross_System label "Système Double Cross".
- Double-Cross_System sameAs Système_Double_Cross.
- Double-Cross_System sameAs Sistema_Double_Cross.
- Double-Cross_System sameAs m.081wh.
- Double-Cross_System sameAs Q869296.
- Double-Cross_System sameAs Q869296.
- Double-Cross_System sameAs Double-Cross_System.
- Double-Cross_System wasDerivedFrom Double-Cross_System?oldid=590064624.
- Double-Cross_System isPrimaryTopicOf Double-Cross_System.