The South is different from the North in two ways. The first is the climate. Much of the Southern Continent is a lot warmer than the much colder North. The second is the fact that it is much less heavily mountainous and more forested and thriving with overgrown plants and greenery. Perhaps the lack of mountains in comparison to the North is what makes a lot of this continent warmer, though the more southern regions start to cool down as you get farther into the high mountains to the south. To the east of the inner sea (Sea of Azov), a hold of a group of Southerners, known as Walled Hold, takes up territory over much of the land there. In the area of the Western Barrier Ridge, almost directly northwest of the Sea of Azov, is an area the Walled Hold people call the Crying Mountains. It is there that an exploration team from Atricis disappeared.
Atricis & Walled Lands Map
Currently, there are only a few established territories in the South. Each territory governs itself and owns the land they claim, allowing them to do with that land as they choose.
Southern Territories Map
Walled Hold holds the largest amount of territory, while New Atricis has been able to claim quite a bit of land for their own as well. Even so, there is still a lot of unclaimed land in the South, for now.