Regional Tournament was held to decide the best young Mage among the existing Counties. In actuality however, it was the Capital's way to pick the best 'seeds' to be nurtured there.
There were 84 Baronies, 58 Viscountcies, 32 Counties, 18 Marches, and 6 Duchies in the entire Braxtein Kingdom. It might sound many, but in truth, most of the lower status Nobles gave the authority over their territories to the higher status Nobles.
Therefore, to easily sum it all, Braxtein Kingdom was divided into six parts. Although that being said, the higher status Nobles also had an obligation to ensure the safety of the lower Nobles' territories.
In return, some of the income of the lower status Nobles' territories would be paid to the higher status Nobles. It was counted as paying tribute. With that policy, the political strife among Marquesses and Dukes was intense. It was the reason why most of Magic Academies were built in Counties.