 Under the administration of British Chartered North Borneo Company (BCNBC), besides imposing many taxes which the locals never heard of, the British also forced every Murut couple who had two children to give up one of them as forced labour.Running out of tolerance, Ontoros Antonom gathered nearly a thousand of Murut warriors from Tenom, Keningau and Pensiangan to fight the British empire in 1915.The British officers were totally shocked when hundreds of Murut flooded their administration building and attacked them.