The Bureau of Internal Affairs(BIA) of the North Korean People’s Committee has significantly expanded the affairs of political crime, political ideology, resident life, and domestic security compared to the Security Bureau of the North Korean Provisional People’s Committee. The BIA played a role in defending national construction activities and government agencies by expanding crime investigation, information activities, security activities, and resident control tasks compared to the United States Army Military Government in Korea.
In addition, the BIA exerted overwhelming control over the social sphere of North Korea by acquiring part of the jurisdiction and military command along with security. North Korea’s political forces have placed the largest number of local administrative departments in the police station, and have collected various information from residents to control the people and society at the local level.
Meanwhile, with the appointment of Park, Il-woo as the head of the BIA, the influence from the Korean Volunteer Army(KVA) group expanded rapidly and the influence from the Northeastern Anti-Japanese Union Army(NAJUA) group rapidly decreased. At the same time, North Korea’s political forces separated the military’s command by directing the people’s army from the NAJUA group and directing the army of the interior bureau from the KVA group.
Eventually, North Korea’s political forces were able to establish and manage the daily and political spaces of the people more closely by establishing the BIA. Also, as the information gathering method of the Soviet Union and the way of dealing with the political crimes of the Soviet Union spread to the North Korean region and society through the BIA, a North Korean social control system began to form.