Prior to the island's unification, reportedly about 1585, there is evidence that the tribes of Ua Pou were sometimes united in war with the tribes of Te I'i on Nuku Hiva against those of Tai Pi Vai.
Antes da unificación da illa, segundo informes de 1585, hai evidencias de que as tribos de Ua Pou participaron ás veces nas guerras tribais de Nuku Hiva unidos coas tribos de Te I'i fronte aos Tai Pi.