The Kingdom of the Dragens was one of the indepedent kingdoms of Westeros until the Dragen Rebellion. It was founded during the time of the First Men by Evan the Cannibal, the first Blooded King. The Kingdom was founded alongside the Kingdom of the North. Bran the Builder and Evan divided the North with Evan ruling over the eastern side and Bran ruling the rest of the North. After the Dragens conquered small parts in the Neck which belonged to the Starks, the Starks entered in open war with the Dragens, destroying their kingdom and merging it with theirs. This was known as the Dragen Rebellion, although it wasn't really a rebellion.