In January 1864 the Waikato campaign moved over the Kaimai Ranges to Tauranga.
There were two decisive actions in this phase of the New Zealand Wars. In late April, at Pukehinahina or the Gate Pā, 250 Ngāi Te Rangi inflicted a heavy defeat on a much larger British force of 1700 men. This defeat embarrassed the British military and its leadership. Two months later some face was saved at Te Ranga when a Māori force of 500 men was heavily defeated after being caught in the open while trying to complete their fortifications. In July Ngāi Te Rangi pledged peace and surrendered some of their weapons.

These are useful subject headings:
Te Ranga (N.Z.), Battle of, 1864.

Books: Non-fiction Lending
993.421 TAU Tauranga : 1882-1982 Bellamy, A.C.

Books: New Zealand Reference Collection (non-lending)
920 GOR Those days, those men Gordon, Mona (contains biography of General Sir Duncan Cameron)
993.022 BEL The New Zealand Wars and the interpretation of racial conflict Belich, James (The Tauranga Campaign p177-200)
993.421 TAU Tauranga : 1882-1982 Bellamy, A.C.
993.421 MAI The story of Gate Pa Mair, Gilbert
SLA 993.022 COW The New Zealand Wars : a history of the Maori campaigns and the pioneering period Cowan, James (vol1 : 1845-1864 Gate Pa and Te Ranga p420-440
SLA 993.022 FEAT The Waikato War 1863-64 Featon, John (Accounts of the battles of Gate Pa and Te Ranga can be found in chapters XXXVII, XXXIX and XL. (p.90-98)
SLA 993.421 MAI The story of Gate Pa Mair, Gilbert
SLA 993.421 TAU Tauranga : 1882-1982 Bellamy, A.C.

Books: Adult Maori Lending
993.022 BEL The New Zealand Wars and the interpretation of racial conflict Belich, James (The Tauranga Campaign p177-200)
993.022 PRI Landscapes of conflict : a field guide to the New Zealand Wars Prickett, Nigel (The Tauranga campaign, 1864 p87-95)

Books: Adult Maori Reference (non-lending)
993.022 PRI Landscapes of conflict : a field guide to the New Zealand Wars Prickett, Nigel (The Tauranga campaign, 1864 p87-95)

Magazine Articles:
NZR REF 355 NEW New Zealand Defence Quarterly Autumn 1998, n20, p32-37 Walking the Waikato Wars: the Battle of Te Ranga, 21 June 1864 Pugsley, Chris

Books: Children's Lending
993.421 MAI The story of Gate Pa Mair, Gilbert

Newspaper Articles:
Refer to Local History card index in New Zealand Reference Collections

Verticle File - New Zealand Reference Collection
Folder - Battle of Gate Pa and Te Ranga (envelope 5)

Tauranga Memories Kete: Battles of Gate Pa & Te Ranga (1864):
Battle of Te Ranga: British - a record of the British who participated in the battle
Battle of Te Ranga: Māori - a record of the Maori who participated in the battle
Colonel Greer’s notes from the Te Ranga battlefield

Websites:
nzhistory.net - http://www.nzhistory.net.nz/war/war-in-tauranga/te-ranga - Te Ranga, war in Tauranga

Links:
Battle of Gate Pa (Pukehinahina) 29 April 1864
Greer, Henry Harpur (1821-1886)
Taratoa, Henare Wiremu (1830-1864)
Puhirake, Rawiri
War Memorials - Tauranga