there is an overall Category: New Zealand Wars, using a more recent term (for Europeans in 1960) for what was called the Māori wars. from this page there are many free space pages about conflicts that make up this category.
there are already some categories for individual events as is appears they took place over a period of time... using the ones listed on Wikipedia, I see e have created on wikitree:
1843 Category: Wairau Affray
1845-1846 Category: Flagstaff War
1846 Category: Hutt Valley Campaign
1846-1858 Category: Wanganui Campaign
1860-1861 Category: First Taranaki War
1863-1866 Category: Second Taranaki War
1863-1864 Category: Invasion of Waikato
1865-1868 Category: East Cape War
1868-1869 Category: Titokowaru's War
1868-1872 Category: Te Kooti's War
it looks like the 58th (as shown in the other answer) was in New Zealand from 1845-1859 (Wikipedia)
also saw references to 1st thru 4th Regiments of the Waikato Militia, so eventually they all should be created, but the correct name and placement of them would have to be determined.
keith