Not every polity in Nusantara will become a separate civilization. Some of them will become a City-state, while some others are unselected. They are divided into 6 (six) sub-region:
The mandala is a model for describing the patterns of diffuse political power in Southeast Asian history, when local power was more important than the central leadership. It is employed to denote traditional Southeast Asian political formations, such as federation of kingdoms or vassalized polity under a center of domination. The basic difference between a mandala and an empire is that an empire has multi-level, overlapping jurisdictions, whereas a mandala does not directly intervene with the domestic affairs of its vassal states outside of its core realms.
Regional powers are a sovereign polity that exercises significant power within a given geographical region. Polity that wield unrivaled power and influence within a region possess regional hegemony.
Despite the fact that they didn't possess a large area of power, their influence on history can't be underestimated. They practises a different cultures and/or rules with some of them managed to survive until this day.
Jambi
Siak
Biak
Notes: CS as City-state