plans focused on expanding the heavy and chemical industries, raising the capability for steel production and oil refining. However, large conglomerate chaebols continuously received preferential treatment and came to dominate the domestic market. As most of the development had come from foreign capital, most of the profit went back to repaying the loans and interest. Students and activists for democracy continued their demonstrations and protests for the abolition of the Yushin system and in the face of continuing popular unrest, Park's administration promulgated emergency decrees in 1974 and 1975, which led to the jailing of hundreds of dissidents. The protests grew larger and stronger, with politicians, intellectuals, religious leaders, laborers and farmers all joining in the movement for democracy. In 1978, Park was elected to another term by indirect election, which was met with more demonstrations and protests. The government retaliated by removing the opposition leader Kim Young-sam from the assembly and suppressing the activists with violent means. In 1979, mass anti-government demonstrations occurred nationwide, in the midst of this political turmoil, Park Chung-hee was assassinated by the director of the KCIA, Kim Jae-gyu, thus bringing the 18-year rule of military regime to an end. Fifth Republic (1979–1987) After the assassination of Park Chung-hee, Prime Minister Choi Kyu-hah took the president's role only to be usurped 6 days later by Major General Chun Doo-hwan's 1979 Coup d'état of December Twelfth. In May of the following year, a vocal civil society composed primarily of university students and labour unions led strong protests against authoritarian rule all over the country. Chun Doo-hwan declared martial law on 17 May 1980, and protests escalated. Political opponents Kim Dae-jung and Kim Jong-pil were arrested, and Kim Young-sam was confined to house arrest. On 18 May 1980, a confrontation broke out in the city of Gwangju between protesting students of Chonnam National University and the armed forces dispatched by the Martial Law Command. The incident turned into a citywide protest that lasted nine days until 27 May and resulted in the Gwangju massacre. Immediate estimates of the civilian death toll ranged from a few dozen to 2000, with a later full investigation by the civilian government finding nearly 200 deaths and 850 injured. In June 1980, Chun ordered the National Assembly to be dissolved. He subsequently created the National Defense Emergency Policy Committee, and installed himself as a member. On 17 July, he resigned his position