Answered by That party girl from USA | May. 31, 2013 16:55
"States Periods (476 BC - 221 BC), the ruling powers began to build walls as a defense against the northern nomadic tribes and other potential enemies. The state of Chu (11th Century BC-223BC) was the first to build a wall, followed by the Qi, Yan, Wei, Zhao and Qin. After Emperor Qin Shihuang unified the six states, he ordered General Meng Tian to connect the existing walls and to extend them further as a front line defense against possible invasion. Thus the Great Wall was formed." These are all the dynasties that help make the wall. The objective and why the Chinese built the wall was to protect China from invasions and attacks, to protect China's people.