Kahar helped in the founding of Kebaktian Rakyat Indonesia Sulawesi (Loyalty of the Indonesian People from Sulawesi, KRIS), along with A. "Zus" Ratulangie, daughter of the Republican Governor of Sulawesi [REF].
After leaving KRIS due to internal conflicts, Kahar was tasked by General Sudirman to prepare for the formation of a republican army in Sulawesi.