 2878, which abolished the Department of Mindanao and Sulu and transferred its responsibilities to the Bureau of Non-Christian Tribes under the Department of the Interior.Muslim dissatisfaction grew as power shifted to the Christianized Filipinos; it was one thing to be administered by the militarily superior Americans, another by their traditional enemies, the Christian Filipinos.Petitions were sent by Muslim leaders in 1921 and 1924 requesting that Mindanao and Sulu be administered directly by the United States.