Three Kingdoms is the name of a historical period in Ancient China. This period lasted from about 180 or 220, to about 280. During this period, China was split between the kingdoms of Wei, Shu Han and Wu. After the fall of the Han dynasty, there were three important successors. However, none of the three was strong enough to win against the two others. During the Han dynasty, China had an emperor. After the end of the Han dynasty, three kingdoms were left. Chinese historians were unable to decide if there was a legitimate sucessor to the last Han emperor. 