Maṇḍala is a Sanskrit word meaning 'circle'. The mandala is a model for describing the patterns of diffuse political power distributed among Mueang or Kedatuan (principalities) in medieval Southeast Asian history, when local power was more important than the central leadership ... the overlord-tributary relationship was not necessarily exclusive. A state in border areas might pay tribute to two or three stronger powers. The tributary ruler could then play the stronger powers against one another to minimize interference by either one, while for the major powers the tributaries served as a buffer zone to prevent direct conflict between them.