jan 1, 221 BC - Qin Shi Huang unifies China, end of Warring States period; marking the beginning of Imperial rule in China which lasts until 1912. Construction of the Great Wall by the Qin dynasty begins.
Description:
https://en.wikipedia.org/wiki/Qin_Shi_Huanghttps://en.wikipedia.org/wiki/Warring_States_period#Qin_unites_China_(247%E2%80%93221_BC)
https://en.wikipedia.org/wiki/History_of_the_Great_Wall_of_China#Qin_dynasty_(221%E2%80%93206_BC)
https://en.wikipedia.org/wiki/Qin_dynasty
Added to timeline:
Date:
jan 1, 221 BC
Now
~ 2247 years ago