Editing Romance of the Three Kingdoms (section)

===Liu Bei's takeover of Yi Province===
Relations between Liu Bei and Sun Quan deteriorated after Zhou Yu's death, but not to the point of war. Following Zhuge Liang's [[Longzhong Plan]], Liu Bei led his forces westward into [[Yi Province]] and [[Liu Bei's takeover of Yi Province|seized control of the territories]] from the governor [[Liu Zhang (warlord)|Liu Zhang]]. By then, Liu Bei ruled over a vast stretch of land from Yi Province to southern Jing Province; these territories served as the foundation of the state of [[Shu Han]] later. Liu Bei declared himself King of Hanzhong after defeating Cao Cao in the [[Hanzhong Campaign]] and capturing Hanzhong Commandery.

At the same time, Emperor Xian awarded Cao Cao the title of a [[vassal]] king – King of Wei – while Sun Quan was known as the Duke of Wu. In eastern China, Sun Quan and Cao Cao's forces fought in various battles along the [[Yangtze River]], including the battles of [[Battle of Xiaoyao Ford|Hefei]] and [[Battle of Ruxukou (217)|Ruxu]], but neither side managed to gain a significant advantage over the other.