Seventy-two kilometres up the Whanganui from the town bridge is Moutoa Island, which for centuries was a strategic place for defence from invasion from warring parties and also a famous battleground of river tribes in settling their differences - the Isle of Heroes.
It was here that a skirmish took place
between the lower Whanganui tribes and a party of up-river Hau Hau on May 14, 1864, that came to be called, by the grateful European settlers, the Battle of Moutoa.
The origins of this battle lie in Taranaki where a new spiritual movement, Pai-marire, formed by the chief Te Ua, started sending out parties to parts of the North Island to recruit adherents to the faith. Known as Hau Hau because of their chants, they took with them dried heads of slain British soldiers to help incite Maori to their cause. The upper Whanganui tribes were first selected for this, as many warriors from the area had been slain in supporting Taranaki in their fight against land losses in the province.
Matene Rangi-tauira, an up-river Maori, was sent with a party to Pipiriki, carrying with them the head of Captain Lloyd, of the British 57th Regiment, who had been killed and decapitated at Te Ahuahu, near Oakura, on April 6. They received a willing and enthusiastic welcome. The Pipiriki Pa at that time was located high on the west bank of the river - the opposite side being used for cultivations. It was here that a government agent, Mr Booth, was living with his family, the only Pakeha residents in the area. Living with Mr Booth was a lad of eight years of age whose father was a British officer and mother a chieftainess of Te Atiawa. She had died when he was young and his father had gone back to England, leaving the boy in Booth's care for upbringing and education. Although after some parleying Booth and family were allowed to go, the lad was retained by the Hau Hau and was able, after his release some time later, to give a vivid description of his experience.
The father of the boy was Colonel H Stretton Bates, 65th Regiment, a subaltern during the first Taranaki war and one-time ADC to Sir George Grey, and his mother the granddaughter of the Chief Matangi, who was the first to sign a deed of sale in Wellington with the New Zealand Company. After his release the young Bates went back into the care of Mr Booth in Whanganui and became a well-known business man in the town.
A nui pole was erected on the Marae at Pipiriki and after days of frenzied dancing around it, and Matene's preaching, the new adherents to the faith decided on a bold attack on the town of Whanganui to drive the Pakeha settlers into the sea. A flotilla of canoes was prepared.
A message was sent to Ngati-Hau at Hiruharama to join with them but they were not interested and declined. Furthermore they immediately notified the down-river tribes that the Hau Hau invasion was imminent and they all gathered at Ranana. The Hau Hau were determined, however, and sent a message to the chiefs at Ranana that they intended to pass down the river to attack Whanganui. But right-of-way was refused by Haimona Hiroti, Mete Kingi and others, not so much out of regard for the Pakeha of Whanganui, as for the mana of their river. Ngati Hau, Ngati Pamoana and lower river tribes resolved to resist the insolent passage of an enemy war party. "If you attempt to force your way - we shall fight you on Moutoa."