As the rationalisation programme was winding down, Sjarifuddin began gathering soldiers from the Socialist Party, Communist Party, and members of the All Indonesia Centre of Labour Organizations for a would-be proletarian revolution in Madiun, East Java, which occurred on 18 September 1948.
Setelah program rasionalisasi mereda, Sjarifuddin mulai mengumpulkan tentara dari Partai Sosialis, Partai Komunis, dan anggota Sentral Organisasi Buruh Seluruh Indonesia untuk mengobarkan revolusi proletar di Madiun, Jawa Timur, yang berlangsung pada tanggal 18 September 1948.