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The Wairau Affray of 17 June 1843, also called the Wairau Massacre in older histories, was the first serious clash of arms between British settlers and Māori in New Zealand after the signing of the Treaty of Waitangi and the only one to take place in the South Island. The incident was sparked when a magistrate and a representative of the New Zealand Company, who held a possibly fraudulent deed to land in the Wairau Valley in Marlborough in the north of the South Island, led a group of European settlers to attempt to clear Māori off the land and arrest Ngāti Toa chiefs Te Rauparaha and Te Rangihaeata. Fighting broke out and 22 British settlers were killed, nine after their surrender. Four Māori were killed, including Te Rongo, who was Te Rangihaeata's wife and Te Rauparaha's daughter.