The Battle of MokuÃȈ Âhai, fought in 1782 on the island of Hawaiûi, was a key battle in the early days of Kamehameha I's wars to conquer the Hawaiian Islands. It was his first major victory, solidifying his leadership over much of the island.
After KalaniÃȈ Âpuûu, the aliûi nui of the island of Hawaiûi, died in the spring of 1782, his family took his remains to the royal mausoleum Hale o Keawe (house of Keawe) at the important heiau called Puûuhonua o Hà Ânaunau. While KalaniÃȈ Âpuûu's son KëwalaÃ»à  had inherited the kingdom, his nephew Kamehameha was given a religious position, as well as the district of Waipiûo Valley. When a group of chiefs from the Kona district, including his brothers and uncles, Keaweaheulu, twins Kamanawa and Kameûeiamoku, and Keûeaumoku PÃÂpaûiahiahi, offered to back Kamehameha instead of Kiwalaûo, he accepted eagerly, traveling back from his residence in Kohala.
KëwalaÃȈ Â's half-brother, Keà Âua Kà «Ã»ahuûula, had been left with no territory by his late father. He went into a rage, cutting down sacred coconut trees belonging to Kamehameha (considered a great insult) and killing some of Kamehameha's men. Their bodies were offered as a sacrifice to KëwalaÃȈ Â, who accepted them, and Kamehameha felt he had to respond to the challenge to his honor.
The battleground was just to the south of Kealakekua Bay, near the present-day community called Keûei., on the bay now called Mokuûakae (which could be a misspelling of MokuÃȈ Âhai), South of Palemano point. The name means "grove of ÃȈ Âhai trees". The tree, Sesbania tomentosa, is now endangered, and no longer grows in the area, so the site is only known from oral history.
As tensions were building, women and children from both sides flooded into the "place of refuge", Puûuhonua o Hà Ânaunau. Kameûeiamoku was the first leader injured, but when KëwalaÃ»à  approached, Kamanawa came to his aid. Then KëwalaÃ»à  was knocked down by a sling stone, and the injured Kameûeiamoku was able to slit his throat with a shark-tooth dagger. It was during this battle that the renowned red feather cloak of KëwalaÃ»à  (now in the Bishop Museum) was captured by Kamehameha the Great.
Keawemaûuhili, KëwalaÃȈ Â's uncle, was captured, but escaped to Hilo. Keà Âua Kà «Ã»ahuûula fled to KaÃ»à «, where he had relatives. After the battle, Kamehameha controlled the northern and western parts of the island of Hawaiûi, including Kona, Kohala, and HÃÂmÃÂkua, while Keawemaûuhili controlled Hilo, and KëwalaÃȈ Â's half-brother Keà Âua Kà «Ã»ahuûula controlled KaÃ»à «. Kamehameha fought several more battles over many years to consolidate his control. In 1790, Keà Âua's party had their footprints frozen into volcanic ash, and in 1791 Kamehameha's forces finally killed Keà Âua at PuûukoholàHeiau.