From A Wiki of Ice and Fire
Tumbleton is the seat of House Footly in the Reach. It is located sixty leagues to the southwest of King's Landing, near the Reach's northeastern border with the Crownlands. According to the key of the map, it is a town. It is near the source of the Mander.
The castle overlooks the town and is described as stout but small.
Tumbleton was the site of two battles during the Dance of the Dragons. In the Battle of Tumbleton, the Two Betrayers, Ser Hugh Hammer and Ser Ulf White, betrayed their black allies and unleashed their dragons, Vermithor and Silverwing, upon the town. Much of Tumbleton was burned to ash by dragonfire and in the subsequent sack by the greens, who encamped around the castle until the second battle. Three dragons fought during the Second Battle of Tumbleton, in which the town was further damaged. Archmaester Gyldayn wrote that Tumbleton was reduced to ash and embers in the civil war, never to be rebuilt, but the town existed again by the reign of King Robert Baratheon.
|“||Seldom has any town or city in the history of the Seven Kingdoms been subject to as long or cruel or savage a sack as Tumbleton after the Treasons.||”|