North Korea
Japan tried to suppress Korean traditions and culture and ran the economy primarily for its own benefit. Korean resistance groups known as Dongnipgun (Liberation Army) operated along the Sino-Korean border, fighting guerrilla warfare against Japanese forces. Some of them took part in allied action in China and parts of South East Asia. One of the guerrilla leaders was the communist Kim Il-sung, who later became the first leader of North Korea.
Kim Jong-il
On 24 December 1991, Kim was also named Supreme Commander of the Korean People's Army. Defence Minister Oh Jin-wu, one of Kim Il-sung's most loyal subordinates, engineered Kim Jong-il's acceptance by the Army as the next leader of North Korea, despite his lack of military service. The only other possible leadership candidate, Prime Minister Kim Il (no relation), was removed from his posts in 1976. In 1992, Kim Il-sung publicly stated that his son was in charge of all internal affairs in the Democratic People's Republic.