Ancient to early medieval :
http://www.spqr.co.nz/
Second Legion Augusta (NZ) Roman Army and Roman life from the 2nd to the 4th century A.D
http://www.nznorsemen.org.nz/
New Zealand Norsemen 793-1066 http://groups.msn.com/waikatonorsegroup
http://dave.fraildream.net/topics/history/ekegroup.htm
Le Chevaliers d'Argent - Norman Medieval Re-enactment Group
Medieval to Renaissance
http://www.sca.org.nz
The SCA is a recreation group that focuses on European life prior to 1600. It is perhaps the biggest such group in New Zealand. It began in the US more than 40 years ago and is likely to be around for a very long time.
To find your nearest group, including those with links to University clubs, please go to the SCA Branches page.
http://www.jousting.co.nz/
http://www.jousting.org.nz/
Order of the Boar and Order of the Lance, groups that researches aspects of tournaments including jousting.
http://www.gatheringdarkness.co.nz/
For medieval re-enactment in New Zealand including the National Association of Ancient and Medieval Arts (NAAMA)
http://homepages.slingshot.co.nz/~annaandpatch/
Argent Lords, display and entertainment group.
http://companyofthedragon.orcon.net.nz/
COmpany of the Dragon, 1200-1400
http://guild.caer.gen.nz/
Wellington Medieval Guild
http://www.freewebs.com/falcon_company/index.htm
Free Companie of the Falcon- displays and shows focussing on the period 1350 to 1450 for displays and shows.
http://www.tms.org.nz/drupal/
Taranaki Medieval Society inc.(1300s through to 1599).
Mid to late Modern:
65th Regiment
Based at the Howick Historical village in Auckland recreating the longest serving British infantry regiment serving in New Zealand (1846 to 1865).
http://en.wikipedia.org/wiki/Alf's_Imperial_Army
Alf's Imperial Army, styled after the 1880s British red-coats.
http://www.hrs.org.nz/
Historical Re-enactment Society, World War II, displays and training.