The basis of communism in North Korea can be traced back to the Liberation of Korea from Japanese imperialism in 1945. In South Korea however, the communist party of Korea had been active in Seoul since 1925.
On October 13, 1945, the North Korea bureau of the communist party of Korea was founded. Kim Il Sung quickly came to the forefront of this early movement. Kim, having served as a captain and guerrilla leader in the Red Army, was seen as an ideal person to serve as a leading role in Pyongyang.
Less than a few years later this would morph into the Marxist Leninist – Workers Party of Korea. It was led by the now Soviet backed Kim Il Sung. Marxism – Lenism would continue as the official state ideology until 1972.