WORLD CIVILIZATION

Detailed explanation-1: -Perhaps the most recognizable symbol of China and its long and vivid history, the Great Wall was originally conceived by Emperor Qin Shi Huang in the third century B.C. as a means of preventing incursions from barbarian nomads.

Detailed explanation-2: -The Great Wall of China was built as a military defensive line to defend the invasions from some northern nomadic nations. Apart from the function of defense, the wall also boosted the economy, as well as promoted the culture exchange and national integration of different nations at its two sides.

Detailed explanation-3: -He did this to symbolize that China was now one empire, under his authority, and therefore no city needed to defend itself against the others. Qin Shi Huangdi then ordered the construction of a massive wall along the empire’s northern border to protect China from its only threat-nomadic warriors from Mongolia.