The Fifth Republic was established in March 1981 by Chun Doo-hwan, a military colleague of long-time president and dictator Park Chung-hee, after the political instability and military rule in the Fourth Republic since the assassination of Park in October 1979. The Fifth Republic was ruled by Chun and the Democratic Justice Party as a "de facto" dictatorship and one-party state to extensively reform South Korea for democratization and dismantle the autocratic system of Park. The Fifth Republic faced growing opposition from the democratization movement of the Gwangju Uprising, and the June Democracy Movement of 1987 resulted in the election of Roh Tae-woo in the December 1987 presidential election. The Fifth Republic was dissolved three days after the election upon the adoption of a new constitution that laid the foundations for the relatively stable democratic system of the current Sixth Republic of Korea.