were often the victims. Zersetzung methods were applied and further developed in a "creative and differentiated" manner based upon the specific person being targeted i.e. they were tailored based upon the target's psychology and life situation. Tactics employed under Zersetzung usually involved the disruption of the victim's private or family life. This often included psychological attacks, such as breaking into their home and subtly manipulating the contents, in a form of gaslighting i.e. moving furniture around, altering the timing of an alarm, removing pictures from walls, or replacing one variety of tea with another etc. Other practices included property damage, sabotage of cars, travel bans, career sabotage, administering purposely incorrect medical treatment, smear campaigns which could include sending falsified, compromising photos or documents to the victim's family, denunciation, provocation, psychological warfare, psychological subversion, wiretapping, bugging, mysterious phone calls or unnecessary deliveries, even including sending a vibrator to a target's wife. Increasing degrees of unemployment and social isolation could and frequently did occur due to the negative psychological, physical, and social ramifications of being targeted. Usually, victims had no idea that the Stasi were responsible. Many thought that they were losing their minds, and mental breakdowns and suicide were sometimes the result. There is on-going debate as to the extent, if at all, that weaponised directed energy devices, such as X-ray transmitters, were also used against victims. One great advantage of the harassment perpetrated under Zersetzung was that its relatively subtle nature meant that it was able to be plausibly denied, including in diplomatic circles. This was important given that the GDR was trying to improve its international standing during the 1970s and 80s, especially in conjunction with the Ostpolitik of West German Chancellor Willy Brandt massively improving relations between the two German states. For these political and operational reasons Zersetzung became the primary method of repression in the GDR. International operations After German reunification, revelations of the Stasi's international activities were publicized, such as its military training of the West German Red Army Faction. Examples Stasi experts helped train the secret police organization of Mengistu Haile Mariam in Ethiopia. Fidel Castro's regime in Cuba was particularly interested in receiving training from the Stasi. Stasi instructors worked in Cuba and Cuban communists received training in East Germany. Stasi chief Markus Wolf described how he modelled the Cuban system based on the East German one. Stasi officers helped in initial training and