More about:  
Regions with same name.
Badge of United States of AmericaUnited States of AmericaBadge of CaliforniaCalifornia Badge of Tuolumne CountyTuolumne County

Unowned Region

Columbia unruled Columbia

When? Ruler Mapper
Current Score
For more information about rulers or mappers, look at this Page in our Wiki.

Sibling Regions of Columbia

Played regions on same layer like Columbia so far:
Neither Ruled nor Mapped Sibling Regions up to now: Sonora.