This feature on the NZHistory.net.nz site
explains events during the reign of Tāwhiao, the
second Māori King, including war in the Waikato
region.
More suggestions and sources
He korero purakau mo nga taunahanahatanga a
nga tupuna: place names of the ancestors, a Maori
oral history atlas. Wellington: New Zealand
Geographic Board, 1990.
Jones, Pei Te Hurinui, and Bruce Biggs. Nga
iwi o Tainui. Auckland: Auckland University
Press, 1995.
Kirkwood, Carmen. Tāwhiao: king or
prophet. Huntly: MAI Systems, 2001.
Te Kīngitanga: the people of the Maori King
movement. Auckland: Auckland University
Press/Dictionary of New Zealand Biography,
1996.