Region
A Region is a now mostly-defunct term once used in the Kingdom of the Middle (and it's associated Kingdoms) to describe a trend towards clusters of baronies allying based on location. As the Midrealm once a covered a huge area, it was somewhat inevitable that SCAdians began identifying with others in the area, more than with the distant, over-arching kingdom. Such self-declared regions included Ealdormere and Northshield, among others.
The growth of "regionalism" in the late 1980s, particularly in Canadian territories of the Midrealm, prompted a move towards making these regions offical, including appointing their own Regional Champions. It was generally regarded as a first step towards becoming a Crown Principality, with the logical end of becoming an independant Kingdom one day.
It was a request from the baronies in what would become Ealdormere to establish an "Ealdormere Champion" that prompted the Ban on Regions, an attempt to halt "regional" growth and keep the Midrealm a single political and military force.
Many of the "regions" of the original controversy are now Principalities or Kingdoms.