After Ghazan, Ming-Hua, P'Li, and Zaheer were apprehended by the Order of the White Lotus sometime around 158 AG for attempting to kidnap Avatar Korra, special prisons were constructed in largely uninhabited areas to detain each of the criminals separately. One of these prisons was commissioned by Fire Lord Zuko and Chief Unalaq and built deep within the western tundras bordering the Northern Water Tribe with the sole purpose of containing P'Li. In the thirteen years that followed, the existence of the facilities remained unknown to the majority of the population and the detained individuals were kept isolated from the rest of the world.