Location from A Song of Ice and Fire by George R.R. Martin
The war-torn heartland of Westeros — a fertile but borderless territory crisscrossed by rivers, perpetually invaded because it sits at the center of every conflict on the continent.
The Riverlands are Westeros's tragedy. The most fertile and well-watered territory on the continent, they should be the richest — instead, they are the most devastated, because every war in the Seven Kingdoms is fought on Riverlands soil. The region has no natural borders, no mountains or deserts to slow invaders, and sits at the geographic center of the realm. The Tullys hold it through alliances rather than strength, and when those alliances fracture, the smallfolk pay the price. The War of the Five Kings turned the Riverlands into a wasteland of burned villages, broken men, and roving bands of outlaws. The Brotherhood Without Banners found fertile ground here because there was no one else to protect the common people.
Rolling green farmland bisected by the Trident and its forks — the Green Fork, the Blue Fork, the Red Fork — with scattered villages, holdfasts, and keeps along every riverbank. In peacetime, the land is lush and productive. In wartime, which is most of the time, it is mud and ashes.
Also known as: the Riverlands, Tully lands, the Trident