Чон Ду Хван
Although Park Chung-hee improved the nation's economy, he was a dictator, so people didn't like him. Eventually, he is murdered by Kim Jae-gyu. In 1979, Chun Doo-hwan was empowered by another coup d’état by military. He oppressed the resistances in the city of Gwangju. That event is called 'Gwangju Uprising'. Despite the Gwangju Uprising, Chun Doo-hwan became the president. But the people resisted again in 1987. This movement is called 'June Struggle'. As a result of Gwangju Uprising and June Struggle, South Korea finally became a democratic republic in 1987.