As President Sukarno moved closer to the Indonesian Communist Party (PKI) in the early 60s, Yani, who was strongly anti-communist, became very wary of the PKI, especially after the party declared its support for the establishment of a fifth force (in addition to the four armed services and the police) and Sukarno tried to impose his Nasakom (Nationalism-Religion-Communism) doctrine on the military.
In an atmosphere intensively promote Nasakom, he was the one who dared to oppose the idea of Nasakom ( nationalism, religion, communism).
Nasakom |