Upon the death of Datu Akob also known as Datu Mimbalawag, his son-in-law, Datu Macaumbang (Sultan of taga Nonok) assumed leadership; he established the territorial boundaries of the present city proper, from Balangasan River in the west of Tawagan Sur River in the east. Beyond the river of Tawagan Sur was the territory of Datu Balimbingan. At one time, Datu Macaumbang requested the assistance of the Philippine constabulary due to the rampant banditry and piracy in the area. A detachment led by Col. Tiburcio Ballesteros stationed at Malangas landed at the place and stationed themselves at Dumagoc Island. The arrival of the soldiers restored peace and order, thereby attracting the influx of settlers from other places.