New Zealand's 19th-century wars
War changed the face of New Zealand in the 19th century. Tens of thousands of Maori may have died in the intertribal Musket Wars between the 1810s and the 1830s. Muskets revolutionised intertribal warfare, decimating some tribes and drastically shifting the boundaries of areas controlled by others. Thousands fled their traditional lands, complicating questions of ownership and opening large areas to potential Pakeha (European) settlement.
https://nzhistory.govt.nz/war/new-zealands-19th-century-wars/introduction