Jin Dynasty: AD 265 to 420

Though the three kingdoms were reunited temporarily in 278 by the Jin Dynasty, non-Han Chinese ethnic groups controlled much of the country in the early 4th century and provoked large-scale Han Chinese migrations to south of the Chang Jiang. There were a plethora of short-lived non-Chinese dynasties that came to rule the whole or parts of northern China in the 4th and 5th centuries. Many ethnic groups were involved, including ancestors of the Turks, Mongolians, and Tibetans. Most of these nomadic peoples had to some extent been "Sinicized" long before their ascent to power.