A taua is a war party in the tradition of the Maori, the indigenous people of New Zealand. Contemporary knowledge of taua is gleaned from missionary observations and writings during the Musket Wars of the early 19th century and the later New Zealand wars. The reason to engage gather a taua may be for reasons of seeking revenge (utu) or seeking compensation for an offence against an individual, community or society (muru).
A taua was typically composed of males, although there were occasions when women fought as well. The party was led by a chief (rangatira), and would be made up of around 70 warriors. This number was the general capacity of a “waka taua” (a war canoe), however sometimes waka would be designed to carry up to 140 warriors, and such canoes were called "Te Hokwhitu a Tu". During the height of the musket wars the number of warriors rose to about 2,000 and the group travelled mainly on foot around the North Island coast.
The most comprehensive written account of a war expedition was written by missionary Henry Williams. This heke was a consequence of the so-called Girls’ War, which was a fight that occurred on the beach at Kororareka, Bay of Islands in March 1830 between northern and southern hapū within the Ngāpuhi iwi. Hengi, a chief of Whangaroa, was shot and killed while he attempted to stop the fighting. The duty of seeking revenge had passed to Mango and Kakaha, the sons of Hengi; they took the view that the death of their father should be acknowledged through a muru (war expedition to honour the death of an important chief), against tribes to the south