Source: Gazetteer, pg(s). 55
Princess Carmina Ustav, facing the threat of a civil war among Ustalav's noble families, split her nation into 16 separate counties in 2862 AR. Each of the major noble families were given nearly complete autonomy within their territories, but each also owed allegiance to the crown. This system of government survived until the nation's conquest by the Whispering Tyrant in 3203 AR.