Genghis Khan, the great warrior, was the leader of a nation to the North of China. He attacked China and occupied part of its land. The conquest was completed by his grandson, Kublai Khan, who established the Yuan Dynasty. In this case, the land to the North and South of the Great Wall belonged to the Yuan Dynasty. No fighting was necessary along the northern territory of China.

Warring States Qin Dynasty Han Dynasty N. & S. Dynasties

Tang Dynasty Song Dynasty Yuan Dynasty Ming Dynasty Qing Dynasty