By 1839, the Declaration of the United Tribes had 52 signatories from Northland and a few signatories from other parts, notably from the ariki of the Waikato Tainui, Pōtatau Te Wherowhero. In February 1840, a number of chiefs of the United Tribes convened at Waitangi to sign the Treaty of Waitangi. During the Musket Wars (1807–1842), Ngāpuhi and other tribes raided and occupied many parts of the North Island, but eventually reverted to their previous territorial status as other tribes acquired European weapons.