The Sukarno era was characterised by a "distrust" between religion and the state. There were also significant changes to the relationship during the New Order. Following an attempted coup in 1965 that officially blamed the Communist Party of Indonesia (PKI) and an anti-communist purge, the New Order government attempted to suppress PKI supporters by making it mandatory to have a religion since PKI supporters were mostly atheists. As a result, citizens were required to carry personal identification cards indicating their religion. The policy resulted in a mass conversion, with most to Protestantism and Catholicism. Chinese Indonesians, who were mostly Confucianists, also faced similar circumstances. Because Confucianism was not one of the state-recognised religions, many converted to Christianity.