The Nuʻuanu Pali was the site of the Battle of Nuʻuanu, one of the bloodiest battles in Hawaiian history, in which Kamehameha I conquered the island of Oʻahu, bringing it under his rule. In 1795 Kamehameha I sailed from his home island of Hawaiʻi with an army of 10,000 warriors, including a handful of non-Hawaiian foreigners. After conquering the islands of Maui and Molokaʻi, he moved on to Oʻahu. The pivotal battle for the island occurred in Nuʻuanu Valley, where the defenders of Oʻahu, led by Kalanikūpule, were driven back up into the valley where they were trapped above the cliff. More than 400 of Kalanikūpule's soldiers were driven off the edge of the cliff to their deaths 1,000 feet below.