Atlas: Commonwealth
From The Somewhere Else Encyclopedia
Commonwealths are collections of provinces that share an identity together surpassing provincial boundaries; this identity can have various bases and/or limits.
A commonwealth may range from internally maintaining great autonomy for each province (perhaps even not forming a stable entity but merely being an alliance of some form between still-independent provinces) to being extremely consolidated (perhaps even a single centralized government managing several different provinces and people(s)).