October 1977 Thai coup d'état was a bloodless military coup which took place in Thailand on 20 October 1977 , staged by the Royal Thai Armed Forces ( RTAF ) . The coup was carried out under the nominal authority of Admiral Sangad Chaloryu of the Royal Thai Navy , head of the National Administrative Reform Council ( NARC ) , but it was effectively led by General Kriangsak Chamanan of the Royal Thai Army , Supreme Commander of the RTAF . It led to the deposition of Prime Minister Thanin Kraivichien , who assumed the office following the 1976 coup d'état ( which was also led by Admiral Sangad and resulted in the establishment of the NARC ) , in the immediate aftermath of the Thammasat University massacre
Thammasat University massacre
Thammasat University massacre
October 1977 Thai coup d'état