 Poncke Princen, the Dutch soldier who went over to the guerrillas, served under Idris's command.Idris participated in the 17 October 1952 affair in which a group of Indonesian Army officers staged a failed coup attempt that would have forced the dissolution of the People's Representative Council (DPR, the parliament) and put President Sukarno as the supreme leader of Indonesia.As a consequence of his action, Idris failed to receive any significant promotion within the Army for 13 years.