The Battle of Kepaniwai was fought in 1790 between Hawai'i and Maui. The forces of Hawai'i were led by Kamehameha I, while the forces of Maui were led by King Kalanikupule. The Hawai'ians were victorious, and would eventually unify all of the Hawaiian islands. 1790 was a common year starting on Friday (see link for calendar). ... Kamehameha the Great established his dynasty in 1810 upon unifying the islands of Hawaii to become the Kingdom of Hawaii. ...