Autonomous Region in Muslim Mindanao
The Autonomous Region in Muslim Mindanao (ARMM) of the Philippines is composed of five provinces and one city namely: Basilan, Lanao del Sur, Maguindanao, Sulu, Tawi-Tawi and the Marawi City. Executive Order No. 36 moved Basilan from Region IX and Marawi City from Region XII. Cotabato City is the seat of the regional government, but the city itself is part of Region XII.