Causes of the Korean War and the Influence of Joseph Stalin
Stalin
Secretary-general of the Communist Party of the Soviet Union (1922–53) and premier of the Soviet state (1941–53), who for a quarter of a century dictatorially ruled the Soviet Union and transformed it into a major world power.
Kim Il-Sung
Communist leader of North Korea from 1948 until his death in 1994. He was the country’s premier from 1948 to 1972, chairman of its dominantKorean Workers’ Party from 1949, and president and head of state from 1972.
Mao Zedong
Principal Chinese Marxist theorist, soldier, and statesman who led his nation’s communist revolution. Leader of the Chinese Communist Party from 1935, he was chairman (chief of state) of the People’s Republic of China from 1949 to 1959 and chairman of the party until his death.

http://www.britannica.com/biography/Mao-Zedong