If one takes a closer look, they will discover that small circles are filled with regional characteristics.
This is the product of the times.
Transportation and communication limitations restrict everyone's social circles. For the majority of the time, everyone is used to dealing with the nobles around them.
Throughout countless ages in the past, through mutual marriages, the neighboring major nobles have long become one family.
Even if they are competitors in normal times, they become natural political allies in the competition of the Kingdom.
Among the many small groups, the alliance of the Five Great Dukes of the North is the most unique.
In other political groups, aside from the major nobles, there are some fairly powerful intermediate aristocrats squeezed in.