475-221 At this time, seven different tribes were fighting each other for land and power in China. Each ruler built small walls to protect themselves. Some of the rulers also built more walls to the north to keep their enemies out of China.
475-221 At this time, seven different tribes were fighting each other for land and power in China. Each ruler built small walls to protect themselves. Some of the rulers also built more walls to the north to keep their enemies out of China.