Ancestry.com has made available a mass of New Zealand military information from published sources. The largest part is for WW1.
Approximately 124,000 served in the New Zealand Expeditionary Force, NZEF, during WW1. About 100,000 were sent overseas, nearly 17,000 died of wounds or sickness while on active service, another 35,000 were wounded.
New Zealand Army WWI Roll of Honour, 1914-1919
Published twice a month in London from 1916 to 1919 this magazine provided reports on service life in the NZEF, including stories, entertainment, and information about sporting and social events. Each issue also contains obituaries and casualty lists for soldiers who died while serving in the NZEF, as well as hospital reports of wounded troops. The database is page images which are not computer searchable.
The release includes databases with scope beyond WW1.
The Defenders of New Zealand
Comprises short biographies of certain colonists who distinguished themselves during the New Zealand War of 1860–1870. It also contains tales of the Maori, a list of volunteers and militia who received the New Zealand Medal, and a list of officers and men of the colonial force who were killed in action during the war. The list of medal recipients has been indexed and is searchable in the New Zealand Army Medal Rolls, 1860-1919 collection.
New Zealand Army WWII Nominal Rolls, 1939-1948
This is a valuable, if incomplete, later period database with information on: embarkation date, surname of enlisted person, rank, army number, unit, marital status, place of enlistment, occupation, last residence, next of kin, address of next of kin, relationship with listed next of kin.