 A month later, on 17 April 1958, Moerdani took part in Operation 17 August, an operation which struck the killing blow on the PRRI rebellion.Moerdani's next assignment was to take care of the Universal Struggle Charter (Permesta), another separatist group in Sulawesi.Similar to what he did in Sumatra, Moerdani and his troops laid down the foundations for an all out attack on Permesta who surrendered in June 1958.