Super Robot Wars: BESM Generation
Sociopolitical zones are independently governed territories roughly conforming to area of nations that were active at the start of the Space Era.
Larger nations like the United States, Canada, Mexico, and Brazil were broken down into their individual states or provinces instead. Most of these zones still share a loose confederation with the zones that originally made up their nation, though there are exceptions.
The three lunar cities are considered one sociopolitical zone.