And I would make a writing prompt to everyone: try to write a nation. How it was formed? How about economy or military? Is it centralised or decantralised? How about political situation? Does the monarch answer to a parliament, or does he rule by the grace of the gods? How about towns? Remember, towns were often small, housing a few thousand at most, and most people got their living off the land. Is it a feudal, an imperial society? A republic, a princibality, a duchy, a kingdom? A city state? A free city within a latger nation? How about religions or cults? How about enviroment? Is it mountainous or flat country? How rich is its farmland? How about rivers, lakes and streams? How do they affect travel? Is there dangerous wildlife, like bears or cougars?
Is there prey? Study medieval examples and take a few pointers. And I don't want to see extremes, where everyone is a mage or whatnot. Magic is like Tabasco - not everyone likes it, but it spices life nicely when used wisely.

Ps. These are just some guidelines and questions to help forming a nation.