Stolen Lands

Across the northern frontier of the River Kingdoms runs a hinterland not even the most brazen bandit lords dare to claim. Sharing borders with strange barbarians and the scions of a proud kingdom, this wilderness invites few intruders, out of fear of provoking the ire of empires. For untold decades this land has lain fallow, left to the devices of nature and deadly beasts, while strange things lurk amid its swamps, forests, and peaks. These are the Stolen Lands, a lordless realm having defied untold conquerors, yet ripe with potential for any bold enough to prove themselves its masters.
The regions called the Stolen Lands takes its name from Brevoy, which claims this realm as rightfully its own. The fertile plains of the Brevic demesne of Rostland spill into the region, coloring the fractious nation’s claim on the wilderness. This makes the border between the River Kingdoms and the northern realm hotly contested, with the descendants of Choral the Conqueror—the unifier of modern Brevoy—and ancient Rostlandic nobles claiming right to lands as far south as Hooktongue Slough and the Kamelands.
In truth, the Stolen Lands belong to no one, and are stolen from no one. Many have tried to claim them, but the abandoned ruins that dot the swath of wilderness stand as testaments to the difficulty of ruling these savage lands. They have remained wild with a fierce tenacity, a haven for monsters and criminals and dangerous secrets, and as such have posed a menace to their neighboring nations as long as anyone can remember.