The Black War was the period of violent conflict between British colonists and Aboriginal Australians in Tasmania from the mid-1820s to 1832. The conflict, fought largely as a guerrilla war by both sides, claimed the lives of more than 200 European colonists and between 600 and 900 Aboriginal people, all but annihilating the island's indigenous population. The near-destruction of the Aboriginal Tasmanians, and the frequent incidence of mass killings, has sparked debate among historians over whether the Black War should be defined as an act of genocide.