Northeast Anti-Japanese United Army
Kim Il-sung, later to become leader of North Korea, was a high-rank officer in this army, and attained a distinction that he invaded China-Korea border and attacked Japanese police station in Bochonbo 1939. It was widely reported by Korean presses such as Donga Ilbo and he became famous in Korea as the most prominent leader of the anti-Japanese movement. After the war, some of the Korean nationals in this army became the first generation of the leaders of North Korea. Besides Kim Il-sung, An Gil, Kim Chaek, Choe Yong-gon and Kang Kon were also Korean high-rank officers of NAJUA, later assumed high positions in North Korea.
Terentii Shtykov
Terentii Fomich Shtykov (Russian:Терентий Штыков; Korean:테렌티 스티코프;  – 25 October 1964) was effectively the first supreme leader of North Korea, as the "de facto" head of its 1945-1948 military occupation and the first Soviet Ambassador to North Korea from 1948 until 1950. Shtykov's support for Kim Il-sung was crucial in Kim's rise to power, and the two persuaded Stalin to allow the Korean War to begin in June 1950.