The Gwangju Democratization Movement, also known in South Korea as May 18 Democratization Movement (Korean: 오일팔 민주화운동; RR: Oilpal minjuhwaundong; lit. Five One Eight Democratization Movement), was a series of student-led demonstrations that took place in Gwangju, South Korea, in May 1980, against the coup of Chun Doo-hwan. The uprising was violently suppressed by the South Korean military in a massacre.
Prior to the uprising, at the end of 1979, the coup d'état of May Seventeenth resulted in the installation of Chun Doo-hwan as military dictator and the implementation of martial law. Following his ascent to power, Chun arrested opposition leaders, closed all universities, banned political activities, and suppressed the press.