He turned the flanks of Mauna Kea, and advancing between this mountain and Hualalai, in the direction of Mauna Loa, arrived at the great central plateau of the island, intending to make a descent upon Kailua.

Keliiokaloa did not wait for him.

Placing himself at the head of his warriors, he marched to meet Umi.

The two armies met on the high plain bounded by the colossi of Hawaii, at the place which is called _Ahua a Umi_.
Two men of the slave race, called Laepuni, famous warriors of Keliiokaloa, fought with a superhuman courage, and Umi was about to fall under their blows, when Piimaiwaa, coming to his rescue, caused the victory to incline to his side.

Although history is silent, it is probable that the king of Kailua perished in the battle.
This victory completely rid Umi of his last rival; he reigned henceforth as sole ruler of Hawaii; and to transmit to posterity the remembrance of this remarkable battle, he caused to be erected on the battle-field, by the people of the six provinces, Hilo, Hamakua, Kohala, Kona, Ka'u, and Puna, a singular monument, composed of six polyhedral piles of ancient lava collected in the vicinity.