Kim Il Sung was the leader of North Korea from 1948 until his death in 1994. Born Kim Sung Chu, he joined the Korean Communist party in 1932 at age 19. He served as a guerrilla fighter against the Japanese in the 1930s and was a Soviet soldier in a Korean unit during World War II (1939-1945). Kim’s attempt to extend his power to South Korea led to the outbreak of the Korean War in 1950.