Why did china build the great wall?

The soldiers were the main power to build the Great Wall at that time. For example, Emperor Qin Shihuang ordered General Mengtian to lead around 300,000 soldiers to protect the defensive line and build the wall after defeating the Huns. read more

The Great Wall of China is the longest man-made structure in the world, stretching 21,196.18km (13,170.6956 miles) long. It was built to keep out raiding parties of nomadic tribes, such as the Mongol, Turic and Xiongnu, from modern-day Mongolia and Manchuria. read more

The Great Wall was built by a labor force including soldiers, common people and criminals. A duke of Chu State in the Spring and Autumn Period (770BC-276BC) was the first one commanding the building of the wall to prevent the invasions from other states. read more

The Great Wall of China is a series of fortifications made of stone, brick, tamped earth, wood, and other materials, generally built along an east-to-west line across the historical northern borders of China to protect the Chinese states and empires against the raids and invasions of the various nomadic groups of the Eurasian Steppe with an eye to expansion. read more