The independence of New Zealand from the United Kingdom following British sovereignty and colonisation came about progressively through a number of constitutional events. No single date is recognised as the point at which New Zealand became independent.
Beginning in the late 1700s New Zealand's Māori population was supplemented by sealers and whalers from Europe, followed by sporadic arrivals of adventurers from Europe and the Americas, Christian missionaries, and escaped convicts from Australia. British Resident James Busby arrived in New Zealand in May 1833. In 1835, a number of Māori chiefs asserted their sovereignty within their independent tribal nations by signing the Declaration of the Independence of New Zealand (He Whakaputanga o te Rangatiratanga o Nu Tireni). On 6 February 1840, William Hobson, as representative of the United Kingdom, and Māori chiefs signed the Treaty of Waitangi, which established the right of the British Crown to govern, and Hobson subsequently proclaimed British sovereignty over the islands in May of the same year.