Kim Il Sung's May 25 teaching

Date: May 25, 1967 • Location: Tokyo, Japan

Having purged a group of rivals, Supreme Leader of North Korea Kim Il Sung delivered the "May 25 teaching", entrenching his son Kim Jong Il as his designated successor.

The Kapsan faction incident was an unsuccessful attempt to undermine the power of Kim Il Sung, the leader of North Korea, around 1967. The "Kapsan faction" was a group of veterans of the anti-Japanese struggle of the 1930s and 1940s that was initially close to Kim Il Sung. In the wake of the 2nd Conference of the Workers' Party of Korea (WPK) in 1966, the faction sought to introduce economic reforms, challenge Kim Il Sung's cult of personality, and appoint its leader Pak Kum-chol as his successor.