The Caledon Bay crisis of 1932–4 saw one of the last incidents of frontier violence, which began when the spearing of Japanese poachers who had been molesting Yolngu women was followed by the killing of a policeman. As the crisis unfolded, national opinion swung behind the Aboriginal people involved, and the first appeal on behalf of an Indigenous Australian to the High Court of Australia was launched. Elsewhere around this time, activists like Sir Douglas Nicholls were commencing their campaigns for Aboriginal rights within the established Australian political system and the age of frontier conflict closed.