The origin of the Great Wallcan be traced back to the seventh century BC, the Spring and Autumn Period
, much earlier than the history of setting defending city. After into the clan society, human in each clan began to dig trenches and put walls around their territory, which has already been proven by many archaeological discoveries.
The Great Wall built in Spring and Autumn Period
The Great Wall was initiated in the Spring and Autumn period and the Warring States period, It was built as a defense to prevent the invasion from other states and external tribes.
The Great Wall built in Ming Dynasty
In Ming Dynasty, the Great wall was rebuilt and repaired. The Great Wall had more complete facilities, stronger construct and better defensive quality. The Great Wall we can see today is mainly the wall of the Ming Dynasty. The construction of the Great Wall is not finished by one dynasty or just last for 10 or 20 years. It started from the Spring and Autumn Period to the Ming Dynasty, lasted for 2,000years. The Great wall was built by Han people and ethnic minorities together. It was constructed for the prevention of the invasions from northern nomads.In the Spring and Autumn Period and the Warring States Period, states built walls along side their boundary to prevent invasions.
The Great Wall built in Qin Dynasty
After Qin Shihuang
unified the whole China and found the Qin Dynasty
, he connected the walls of Yan, Zhao and ex-Qin State in the north border of its territory. The wall extended from the present Taolin county, went eastward to the wall of Liaodong for thousands of miles.
The construction of the Great Wall runs through the feudal era of China. About 20 Dynasties built or repair walls in the history, and left many sites of the old walls that you can find today.