The Mau was a non-violent movement for Samoan independence from colonial rule during the first half of the 20th century. Mau means 'opinion,' 'unwavering,' 'to be decided,' or 'testimony' denoting 'firm strength' in Samoan. The motto for the Mau were the words Samoa mo Samoa (Samoa for the Samoans). Similarly in Hawaii'an Mau means to strive or persevere, and is often linked with Hawaii'an poetry relating to independence and sovereignty struggles.
The movement had its beginnings on the island of Savai'i with the Mau a Pule resistance in the early 1900s with widespread support throughout the country by the late 1920s. As the movement grew, leadership came under the country's chiefly elite, the customary matai leaders entrenched in Samoan tradition and fa'a Samoa. The Mau included women who supported the national organisation through leadership and organisation as well as taking part in marches. Supporters wore a Mau uniform of a navy blue lavalava with a white stripe which was later banned by the colonial administration.
The Mau movement culminated on 28 December 1929 in the streets of the capital Apia, when the New Zealand military police fired on a procession who were attempting to prevent the arrest of one of their members. The day became known as Black Saturday. Up to 11 Samoans were killed, including Mau leader and high chief Tupua Tamasese Lealofi III with many others wounded. One New Zealand constable was clubbed to death by protesters.
The Mau movement's efforts would ultimately result in the political independence of Samoa in 1962 but the height of the movement's activity in the Western Islands occurred in the late 1920s and early 1930s.
Broadly, the history of the Mau movement can be seen as beginning in the 1800s with European contact and the advent of Western powers, Britain, United States and Germany, vying for control of the Pacific nation. The country became German Samoa (1900–1914) followed by New Zealand colonial rule during which the Mau gathered national support.