Fire Emblem: The Age of Legend
A historian’s term more than anything else, precisely which countries fall into this category is somewhat disputed. Yeoria, The Northern Principalities, Mgarmir, and Snorivia are almost invariably included by people elsewhere. Peruvia is included by those in the Frysolythian Empire or beyond. Mgarmirnir might well exclude themselves, Yeorians might only include the Northern Principalities, and only the people of that land commonly take pride in the term. It carries connotations of barbarism, uncouthness, and isolation from civilization at large.
Some modern nationalists in these countries though have begun trying to reclaim the term as a badge of pride and shared, non-Frysolythian culture.
From an economic perspective though, probably the boundary of this region is that of the use of the Silver North-Ring as currency. In this context, The Northern Principalities, Yeoria, and Snorivia definitely qualify and Mgarmir is questionable.