The Counterintelligence Service or KOS (Croatian: Protuobavještajna služba; Serbian: Контраобавештајна служба/Kontraobaveštajna služba; Slovene: Kontraobveščevalna služba; Macedonian: Контраразузнавачка служба) was the counterintelligence service of the Yugoslav People's Army (JNA) that existed between 1946 and the breakup of Yugoslavia in 1991. In 1992, the Security Administration continued its work in Serbia and Montenegro.
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Founding and structure
KOS was formed in 1946 as one of the remnants of the Department for Protection of the People (OZNA), with State Security Directorate (UDBA) forming the second, civilian, component of the new security and intelligence structure of SFR Yugoslavia.
Activities
Most information is still scant due to its classification as military secret, but some can be traced in the media, especially during the Milošević tenure and the role played in the break-up of SFRY (e.g. Operation Labrador and Operation Opera orientalis).