 After the period of the Three Kingdoms (220–80), China was reunified by the Jin dynasty. Unification, however, lasted only for a few decades. The southward migrations that followed the fall of the capital Luoyang to the Xiongnu in 311 involved not only members of the court and the aristocracy, but also representatives of Tianshi dao. As a result, the religion of the Celestial Masters reached Jiangnan, the region south of the lower Yangzi river, and apparently for the first time came in touch with the traditions of that region. The events that followed left a permanent mark on the history of Daoism.