The Matoran-Rahi War, also known as the Great War, was a conflict between the Matoran of Mata Nui and the local Rahi who were, at the time, enslaved by Makuta Teridax to do his will. It took place prior to and during the Quest for the Masks, making it much more difficult for the Toa to complete the quest. Teridax was attempting to exert his control over the Matoran, and thus turned the island's Rahi against the villagers. However, guided by the wisdom and courage of the Turaga, the Matoran refused to cower to the threat. Defense forces sprung up in Ta-Koro, Le-Koro, Onu-Koro, Ko-Koro, and Ga-Koro in the forms of the Ta-Koro Guard, Gukko Force, Ussalry, Sanctum Guard, and Ga-Koro Defense Force respectively. The war lasted nearly a thousand years, throughout the Dark Time. It is unknown what