History and cultural transmission
Māori warrior traditions developed in Aotearoa within local communities, leadership structures, and tikanga. The Whare-tū-taua, the house or school of war, is associated in oral traditions with the training of young toa. The precise content and methods of transmission varied by iwi and period.
Colonization, war, land loss, assimilation, and the suppression of the Māori language and knowledge disrupted transmission. The Tohunga Suppression Act of 1907 is often mentioned in the broader history of the suppression of traditional knowledge, but not every local development of Mau Rākau can be directly attributed to it.
During the Māori Renaissance from the 1970s and 1980s onward, language, whakapapa, art, haka, and martial arts became visible again and were actively passed on. Mita Mohi played an important role in the Mokoia taiaha wānanga. According to the sources provided, it had reached more than 11,000 people by 2007 and more than 20,000 later on. These figures are source-specific and time-specific. [Source: https://teara.govt.nz/en/mau-rakau-maori-use-of-weaponry]
Myth, whakapapa, and mana
Oral traditions connect weapons such as the taiaha and patu with Tāne, god of the forest, and Tū, god of war, sons of Ranginui and Papatūānuku. Such stories are part of Māori mātauranga and mythology. They are not presented as empirical evidence of origins.