After hasty preparations on both sides a battle was fought at Hauiki, in which Kiwalao was slain. The royal army was routed, and Keoua, the half-brother of Kiwalao, fled to Kau, where he declared himself king of Hawaii, while Keawemauhili, the uncle of the dead king, who was allowed to escape owing to his extremely high rank, retired to Hilo and set up an independent government of his own. After the death of Kiwalao, Keopuolani, his infant daughter, whose mother had fled with her to Kahekili, moi of Maui, was the only one whom Keawemauhili was willing to recognize, and three distinct factions began to struggle for the mastery of the island.

While a desultory warfare was being carried on by the three rival chiefs of Hawaii, during which Kamehameha was steadily growing in strength, a new element of military and naval power made its appearance in the group, and became an important factor in the political changes that speedily followed. In 1786 the first foreign vessels, after the departure of the Resolution and Discovery, touched at the islands, and during the year following American, English, French, Spanish and Portuguese merchant-men in considerable numbers visited the group, and the people began to supply themselves with knives, axes, cloths, beads and other articles of foreign manufacture, and the chiefs with swords, guns, powder and lead and other warlike materials. Payment for these articles was made to some extent in pigs, fowls, fruits and vegetables, but principally in sandal-wood, in which the mountainous districts of the islands abounded, and which found a ready market in China. Many deserting sailors entered the service of the chiefs of Oahu and Hawaii, and to a less extent of the other islands, and became the instructors of the natives in the use of fire-arms; and Kamehameha was especially fortunate in securing the services of Isaac Davis and John Young, who took an active part in the campaigns of the final conquest. Young married into a native family of consequence, and became the grandfather of the late queen-dowager Emma, widow of Kamehameha IV.

In 1790 Kamehameha, during a temporary cessation of hostilities on Hawaii, invaded Maui with a large force. To the expedition Keawemauhili had been in some manner induced to contribute a battalion of warriors. In retaliation for this showing of friendship for Kamehameha, Keoua invaded Hilo, defeated and killed Keawemauhili, and assumed the sovereignty of that district. Nor did he stop there. During the absence of Kamehameha he overran the districts of Hamakua and Kohala, and was in the act of possessing himself of the whole island when Kamehameha abruptly left Maui, which he had completely subjugated, and returned to Hawaii.

Kaiana had been left to guard the district of Kona during the absence of Kamehameha, and that was the only division left unoccupied by Keoua. Kamehameha landed with his forces at Kawaihae, and Keoua fell back with his army to Paauhau. There and at Koapapa a two days’ battle was fought, when Keoua retreated to Hilo, and Kamehameha retired to Waipio to recruit his losses.

Stopping for a few days to divide the lands of the district among his chiefs, Keoua started on his return to Kau. His path led by the crater of Kilauea. His army, marching in three divisions, encamped on the mountains, the central division finding quarters not far from the crater. Before morning an eruption occurred, and four hundred warriors were suffocated. This was considered a special visitation of the wrath of Pele, the goddess of the volcano, and she was thereafter deemed to be the friend of Kamehameha.

For a year or more continuous efforts to crush the power of Keoua were made by Kamehameha. Kaiana operated against him in Kau, and Keeaumoku in Hilo, but he stubbornly and successfully resisted. Availing himself of this condition of affairs, Kahekili, moi of Maui, assisted by Kaeo, king of Kauai, invaded Hawaii, probably for the purpose of creating a diversion in favor of Keoua, but the combined armies were driven from the island by Kamehameha.

Keoua, however, remained unsubdued, and Kamehameha resolved at every sacrifice to crush him, as a preliminary step toward the conquest of the entire group, which at that time he began to meditate. Some time before he had sent the grandmother of Kaahumanu to Kauai to consult the prophets of that island, and word was brought back to him from the renowned Kapoukahi that if he would rebuild the heiau of Puukohola and dedicate it to his war-god, he would become the master of Hawaii. Some work had been done on the temple, and Kamehameha determined to complete it at once. He therefore ordered large relays of people from the surrounding districts to repair to Kawaihae and assist in the building of the heiau. Many thousands responded. With the exception of Keliimaikai, a brother of Kamehameha, who was left uncontaminated for the consecration, every chief took part in the labor, and the temple was soon completed, with sacrifices embracing a large number of human beings as the work progressed.

Thus was the temple of Puukohola completed, but, pending its formal consecration, Keawe-a-Heulu and Kamanawa, two of the principal counselors of Kamehameha, were despatched to Kau under a flag of truce, to invite Keoua to visit Kamehameha, with the view of arranging terms of peace. Keoua received the ambassadors kindly, and consented to the conference. His actions show that he suspected the motives of Kamehameha, but he resolutely accepted the hazard of placing himself at the mercy of his enemies.

Proceeding in state in a double canoe, Keoua arrived at the landing of Mailekini, in Kawaihae. Observing Kamehameha on the beach, Keoua called to him, and was invited to land. Several canoes were around him, and as he leaped ashore Keeaumoku, from one of them, treacherously drove a spear through his body, killing him at once. An attack was then made upon his attendants, and all but two of them were slain. As this, and many other events noted in this chapter, are briefly referred to in the legend of “The Prophecies of Keaulumoku,” it will be sufficient to mention that the body of Keoua was taken to the temple of Puukohola, and there sacrificed to Kaili with ample pomp and ceremony. The possessions of the unfortunate chief passed into the hands of Kamehameha, who at once became the acknowledged sovereign of the entire island. This was in 1792.

In Kamehameha’s previous campaign against Maui, from which he had been recalled by the successes of Keoua at home, that island, as already stated, had been completely subjugated. At the time of the invasion, Maui, Oahu, Molokai and Lanai were all in the possession of Kahekili, who had taken up his residence in Oahu, leaving his son Kalanikupule in charge of Maui. In a single mighty battle on the plains between East and West Maui, Kamehameha had destroyed the army of Kalanikupule, who had escaped to Oahu and joined his father, while the most of the chiefs of Maui had sought refuge on the other islands.