In early part of 1956, a group of leaders made a representation to the defunct Provincial Board of Cotabato headed Datu Udtog Matalam, requested for the separation of Tulunan from mother municipality, M’lang but failed due to the oppositions. The strong determination of the people to be independent was again represented by the group known as the “BIG FIVE” composed by Datu Dabpil Tuden, Arsenio Villamor Sr., Juan Jinen, Mauro Quibrantar and Jose Ordenia succeeded in their mission with flying colors.