Defense Security Command

Defense Security Command
Defense Security Command
국군 기무사령부
Agency overview
Formed October 1977
Jurisdiction Korean Government

The Republic of Korea Armed Forces's Defense Security Command (DSC) was founded as the "Army Counterintelligence Corps" on October 21, 1950, and it functioned as the primary organization within the military charged with internal security, preservation of loyalty to the regime, and deterrence and investigation of subversion.

"The Defense Security Command was formally activated in October 1977. This merger of the Army Security Command, the Navy Security Unit, and the Air Force Office of Special Investigations produced a single, integrated unit under the direct command and operational control of the minister of national defense." (Library of Congress Country Study via [1])

Chun Doo Hwan became chief of the Defense Security Command in February 1979, eight months before Park Chung Hee was assassinated on October 26, 1979. From his position as commander of the DSC, Chun effectively became chief investigator of the assassination, said Don Oberdorfer in his book The Two Koreas (Addison-Wesley, Reading, Mass, 1997, ISBN 0-201-40927-5, p.121). On December 12, 1979, a group of generals led by Chun arrested martial law commander General Chung Seung Hwa, the army chief of staff, and seized key sites. Chun eventually became leader of South Korea.


On November 11th, 2011, the Seoul National Labor Relations Commission exposed a Defense Security Command member who had been illegally collecting the information of civilians registered in the National Health Insurance Corporation for three and a half years.[1]


  1. ^ Kim (김), Tae-gyu (태규) (2011-11-12). "기무사, 건보공단서 3년6개월간 민간인 62명 개인정보 빼냈다" (in Korean). The Hankyeoreh. Retrieved 2011-11-12. 

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