Political map of Australia, New Zealand & the Southwest Pacific 21 June 1864 (Invasion of the Waikato): In 1858 a Māori King was proclaimed in the Waikato (Māori King Movement), with many tribes from across New Zealand pledging support. Seeing this King Movement as a threat to colonial rule, the British invaded the Waikato in 1863–64 (Invasion of the Waikato), driving the King and his Kingite supporters into the interior of the North Island (King Country).