Dark Ages of Cursed Nations

There is a vast world, which resembles medieval Europe, but in unrecognisable way. Ancient civilisations, once great empires, are now destroyed. Some smaller nations left, however, and they are now the ones, who have a chance to expand, or at least live peacefully. This continent is called Yuronya. It is divided by northern baltic tribes, and southern slavic tribes. Everything west or east is considered a wasteland, because it is blocked by wild forests and mountains.