4·19 혁명
In the 1970s theologians began exploring the theme of minjung liberation and many were removed from their positions at universities and seminaries for coming to the defense of those who were oppressed and imprisoned by the Park Chung Hee regime and the Korean Central Intelligence Agency. Minjung movements that are important for understanding the Korean context include the Tonghak Peasant Revolution, the March 1st Movement, and the April Revolution.