The period of the Warring States (475-221 BCE) describes a time of endless wars between seven rival states: Qin, Chu, Qi, Yan, Han, Wei, and Zhao. These states were finally unified in 221 BCE under the Qin dynasty to lay the origin of today's China, with its two main rivers: the Yellow and the Yangtze.<br/><br/>Yellow & Yangtze, the sister game...