From the 1600 to 1750 the tamaki tribes terraced the volcanic cones and they grew kumara on 2000 hectares of land behind the isthmus.
In 1750, the population grew and became very popular and wealthy.
Between 1740 and 1750 the tribe Ngati whatua-o-kaipara invaded the isthmus and killed the paramount chief of wai-o-hua. The tribe obtained their dominance by intermarrying Ngao ohu, a descendant of wai-o-hua.
A period of time after the marriage was when the tamaki tribe was most vulnerable to attack, due to Ngati paoa and Ngapuhi conflict.
In 1821, Leader hongi hika of the ngapuhi launched a series of attacks on the region. He killed thousands and enslaved hundreds, all this was done to fill a vengeance. He duplicated the slaughter at te totara, the ngati maru, the fortress near Thames.
In 1825 Ngapuhi set out again, yet this time their targets were Ngati Whatua. This battle was known as te ika - a - ranginui near kaiwaka. In this battle Ngati Whatua won, taking his people into exile and abandoning the isthmus,.