According to the Yonhap news agency, the ceremony was held in the city of Gwacheon to the south of Seoul and was hosted by South Korean Defense Minister Song Young-moon.
The DSSC, headed by Lt. Gen. Nam Young-sin, will be charged with collecting intelligence and combating activities aimed at inflicting damage to the country, the news outlet said, adding that the new unit would comprise 2,900 personnel, marking a 1,300-decrease compared to the previous unit's staff.
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South Korean President Moon Jae-in ordered to form a new security command in early August, following the results of military investigations that reportedly proved that the DSC considered introducing a martial law to suppress protests against previous President Park Geun-hye, using military force. According to the investigators, the unit also put under surveillance families of the victims of the Sewol ferry, which sunk in 2014.