Thus the spirit of crime and revenge, which for years had darkened the page of New Zealand's history, suddenly disappeared in the eagerness for trade, and in its stead came the spirit of industry, which sent countless natives toiling in the swamps and on the hill-sides, preparing in feverish haste the fibre wherewith they might purchase this new weapon of destruction. This mad rush for muskets did not escape the keen observation of Te Rauparaha, who saw with unerring precision what its ultimate effect must be. Had he been a resident of the east coast there is little doubt that he too would have plunged with enthusiasm into the fatal scramble, trusting to his natural shrewdness and business acumen to secure for him a fair share of the market's prizes. But he was at the outset placed at this disadvantage. His country was on the west coast of the island, where the whalers and traders seldom came; and the Ngati-Toa, unlike the Nga-Puhi, had few or no opportunities of holding intercourse with the pakeha, from whom alone the coveted muskets could be procured. It was therefore with a heavy heart and sorely perplexed mind that Te Rauparaha returned to Kawhia, for he knew with absolute certainty that so soon as the Waikatos succeeded in arming themselves with firelocks it was only a question of time when they would decide to attack him and his people, in satisfaction for many an old grudge. Then the day would go hard with Ngati-Toa, who could only encounter this new invasion with stone clubs and wooden spears.
As the result of many years of intertribal wars the country surrounding Aotea harbour, to the north of Kawhia, had become almost denuded of population. A few inconsiderable pas still remained, but their defenders were so inefficient as to constitute a living invitation to some stronger people to come down and exterminate them. Thus it was not surprising that a section of the Ngati-Mahanga tribe, whose home was at Raglan, should, after a successful raid in this quarter, decide to permanently occupy so inviting a district. They immediately attacked and drove out the feeble occupants, and then sat down to enjoy the fruits of their conquest. This act of aggression was hotly resented by Te Rauparaha, who could not suffer his allies to be buffeted in so unceremonious a manner, and within an incredibly short period of time he had his fleet of canoes on the water carrying a taua to Whanga-roa, where he met and decisively defeated Ngati-Mahanga. The report of this Ngati-Toa victory soon spread throughout the enemies' domain, and in due course reached the ears of those branches of the tribe living at the mouth of the Waikato River, who at once resolved to espouse the cause of their defeated friends. Manning seven large canoes, they came down the coast with a well-disciplined force under the renowned leader Kare-waho, and landing at Otiki, they first demolished the pa there and then passed on to Ohaua, whither the fugitives had fled, and delivered their attack upon that stronghold. No decisive result was achieved, as the rupture appears to have been healed before victory crowned the arms of either side, and the invaders were as eager to return as the besieged were glad to see them go. But the peace thus hastily made was as speedily broken, and a series of events was soon to ensue which was fated to have far-reaching results. Shortly after the return of the northern raiders a noted Waikato warrior, named Te Uira, came into the disputed Aotea territory, and while there varied his sport as a fisherman by killing a stray Ngati-Toa tribesman. On hearing of this tragedy Te Rauparaha and a war party promptly went over and retaliated by slaying Te Uira. Though to all appearances strictly within the code of morality which sanctions the taking of a life for a life, the Waikato people chose to regard this act as one of treachery, and the magnitude of the crime was measured by the value of the life taken. Te Uira was a man who had ranked high in their esteem. As a warrior and a leader of men he was a toa, indeed, and his death was to them a disaster. They therefore determined that the annihilation of Ngati-Toa was the only adequate solace for their injured feelings, and on this end they now concentrated their energies. War party after war party was sent over to Kawhia, and many desperate battles were fought, out of which Ngati-Toa seemed to emerge generally with success. But the gloom of impending disaster was gathering round Te Rauparaha, for the powerful Ngati-Mania-poto tribe became leagued with Waikato against him; and, although he had no difficulty in defeating them singly when they met, their coalition with his old enemy was a more serious matter. Stung by a recent repulse at Ta-whitiwhiti, they hurried messengers to all their distant friends, and in answer to their call a combined force of 1,600 men under Te Rau-Angaanga, father of the more famous Te Wherowhero, was soon marching against Kawhia's diminishing band of defenders. Crossing the ranges, they soon fell upon the Hiku-parea pa, which they invested at the close of the day. During the night half their force lay concealed in ambush, and when the garrison emerged in the morning to give battle to an apparently small body of besiegers they were mortified to find themselves so hopelessly outnumbered and outgeneralled that there was nothing left for them to do but die as bravely as they might. The invaders then marched to attack the great Te Totara pa, where Te Rauparaha was personally in command, and here again the defenders were driven in before the swift onslaught of the allies. But where his arms had failed him Te Rauparaha's diplomacy stood him in good stead. He managed to soothe Te Rau-Angaanga into agreeing to a truce, and a temporary peace was patched up, only to be broken by the turbulent temper of the Ngati-Toa, who saw no impropriety in committing fresh aggressions so soon as their militant neighbours had returned home.
The position was thus becoming grave for Te Rauparaha, and in an effort to stem the threatening disaster he sought to turn to some practical purpose the influence and prestige which he had now gained with the neighbouring chiefs. He suggested to his more trusted friends amongst the Maori leaders the need and wisdom of a confederation of all their tribes against the oppression of the Waikato people. But, though conducted with consummate tact and skill, these negotiations were destined to be futile. While all were friendly enough with Te Rauparaha, mutual jealousies existed amongst the other tribes, which destroyed any prospect of that unanimity and cohesion so essential to the success of such a scheme. Nga-Puhi remembered how Ngati-Maru had invaded their territory in days of old, and now that they were possessed of muskets they saw a prospect of repaying the debt – a chance much too promising to be lightly thrown away. Te Heuheu, the great chief at Taupo, would not coalesce with Ngati-Maru, and the Arawa still nursed their grudge against Tainui. These ancient grievances, which never seemed to die, kept the tribes outside Waikato apart, while the fact that Te Wherowhero had been able to form an offensive and defensive alliance with the Blücher of Maoridom, Te Waharoa, so strengthened his position that, after months wasted in fruitless appeal, Te Rauparaha returned to Kawhia more than ever convinced that if his tribe was to be spared the humiliation of defeat, and perhaps annihilation, self-reliance must be the keynote of his future policy.
During the next two years (1816-1818) Te Rauparaha devoted himself to occasional excursions against Waikato, in which he was moderately successful; but his more important operations at this period were directed