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.
Wonsu
While he was the Supreme Commander of the Korean People's Army, Kim Il Sung became North Korea's first marshal during the Korean War by the decision of the Supreme People's Assembly, the unicameral parliament of North Korea, on February 4, 1953. Period photographic evidence demonstrates that the early marshal shoulder board rank insignia was the same as that of the current vice marshal shoulder boards (a large star overlain with the Democratic People's Republic of Korea coat-of-arms).