In the world of Evandar, there is a level of technology that is approximately equivalent to what was in the world during the middle ages (5th - 15th cent CE). The region that the first books take place in are a rough analog to Europe. I have other regions that will be approximately like other cultures from that period of history. Some of them, you might have glimpsed in the stuff I have shared here.
The Horse Lords (One tribe named for Minghaa, others yet to be named) are roughly based off of the Huns.
The Cordid/Kordid are a bit of an homage to Tolkein's Rohirrim, but I will be keeping them tied to their seafarer roots. Stories are due about how they were driven away from the sea.
Elspar is those of the Cordid who were not driven away by the first wave of invaders from the south and the descendants of those invaders. It will be loosely patterned after Italian culture from this era with a measure of Gallic and Germanic influences.
Corinth on the eastern edge of the sea and south of Elspar is going to be my analog to Byzantium, with a few notable changes. It is an opulent and wealthy kingdom that technically is a satellite of the empire of Caer Dodth, but powerful enough that it functions as its own entity.
The empire of Caer Dodth stretches along the southern landmass below the sea of shadows (whose northern shores are Evandar and Ranyth) until it reaches near the isthmus of night. It is how I envision the Roman empire would have been if they remained into the middle ages.
The isthmus of night is so named because it is accursed ground. On both sides of the isthmus is a region known as the Darklands. On the northern side, there is a great stretch of marshlands known as the fens. The people who live there are patterned roughly after various aboriginal cultures from around the world. Outside of the fens, the Darklands are peopled by the remnants of various cultures that had gone before and served the will of the Deamons.
West of the kingdom of Evandar is a desert known as The Waste. Across this desert lies Dacia. Dacia is a mishmash of pseudo-arab cultures as handed down through the imagination of Western society. There are other peoples both within the Waste and beyond it that ring truer to the Arab cultures of antiquity (as far as I can research them).
From what I know of the state of our world during the era we call the middle ages, I am attempting to place the world of Evandar in a similar context. There will be remnants of an earlier time scattered here and there. The elves will show, like Sideria and her knapped stone arrowheads, evidence of that earlier time. It will be a bit tricky, I know, to build this level of complexity but I think the end results will be well worth it.