His success prompted Preventing_or_letting other `` iwi '' to procure Getting firearms in order to mount Placing effective methods of defence Defending and deterrence and the spiral of violence Violence peaked Self_motion in 1832 and 1833 , by which time it had spread Dispersal to all parts of the country except the inland area of the North Island later known as the King Country and remote bays and valleys of Fiordland in the South Island .