An Islamist political movement aspired to form an Islamic state, established "Darul Islam/Tentara Islam Indonesia" (DI/TII) in 1949, which launched an armed rebellion against the Republic throughout the 1950s. The outbreak of the Islamic state in multiple provinces, started in West Java led by Kartosoewirjo, the rebellion also spread to Central Java, South Sulawesi and Aceh. The Islamist armed rebellion was successfully cracked down in 1962. The movement has alarmed the Sukarno administration to the potential threat of political Islam against the Indonesian Republic.