failing to deliver their demands to the governor, Riau students, under the Indonesian College Students' Action Union (KAMI) and the Indonesian Students' Action Union (KAPI), came to the office of the Regional People's Representative Council of Riau on 15 July 1966. Their presence was met with fierce resistance from the armed forces, and a clash occurred between the students and the armed forces. 15 KAPI members fell on the ground after being hit, kicked, or lunged by the soldiers. Several students, such as Mustafa Noor, Leonard Kaligis, M Arifin, Fauzi Suherman, Agus Jun Batuah, from the Ampera Mission and Imran, Asman, and Juliaman from KAPI and KAMI were arrested. On 28 August 1966, student groups and the Riau populace issued two demands. The first demand urged the government to create political stability in Riau, and the second demand was to replace the governor as soon as possible. The student groups and the Riau populace proposed Arifin Achmad as the replacement for Nasution. The demand was fulfilled by the central government, as on 15 November 1966, Arifin Achmad was inaugurated by Basuki Rachmat as the acting Governor of Riau. Nasution later left Riau on 27 December 1966. Career After he was ousted from the governor's office, Nasution still retained his office as the member of the People's Consultative Assembly. He represented the Armed Forces instead of representing the Riau province. A year after he left office, Nasution was promoted to brigadier general, and he was inaugurated as the Commander of the Merdeka Regional Military Command on 28 October 1967 until 23 March 1970. During his time in the Merdeka Regional Military Command, he took part in crushing the Free Papua Movement. After that, he was promoted to major general in 1971, and assumed office as the Inspector General of the Indonesian Army until in 1973. He then became the Inspector General of the Ministry of Information in the same year. On 12 September 1978, alongside four other ambassadors, Nasution was inaugurated as the Ambassador of Indonesia to South Korea, replacing Sarwo Edhie Wibowo. As the ambassador post was a civilian post, he officially resigned from the military after taking office. He would hold the office until 30 January 1982. Governor of North Sumatra On 13 June 1983, Nasution was officially inaugurated as the Governor of North Sumatra by the Ministry of Internal Affairs Soepardjo Roestam. He replaced the previous governor, Edward