Qin Dynasty (jan 1, 221 BC – jan 1, 207 BC)
Description:
The king of Qin allied with the Zhou, but overthrew and defeated the last of the Warring States because of how powerful they were. They unified China and built the Great Wall, which was made to keep out enemies. They declined due to the death of the emperors, having high taxes, and brutality, resulting in revolts.Added to timeline:
Date:
jan 1, 221 BC
jan 1, 207 BC
~ 14 years