I really like the legend mentioned in the article:

According to a legend of the local Torghut population, in 1372 a Mongol military general named Khara Bator was surrounded with his troops by the armies of the Ming dynasty. Diverting the Ejin River, the city’s water source that flowed just outside the fortress, the Ming dynasty denied Khara-Khoto water for its gardens and wells. As time passed and Khara Bator realised his fate, he murdered his family and then himself. After his suicide, Khara Bator’s soldiers waited within the fortress until Ming troops finally attacked and killed the remaining inhabitants.