 It brought Indonesians together, using the banner of Islam in opposition to Dutch rule.In contrast, the Communist Party of Indonesia (PKI), formed in 1920, was a fully-fledged independence party inspired by European politics.In 1926, it attempted a revolution throughout Indonesia through isolated insurrections across Java that panicked the Dutch, who arrested and exiled thousands of communists, effectively neutralising the PKI for the remainder of the Dutch occupation.