关羽失荆州后,刘备不顾群臣反对,也不顾《隆中对》里“外结好孙权”的基本方针,起倾国之军东伐孙吴,结果彝陵兵败,导致蜀汉国力大损,刘备也身死于白帝城。从此,蜀汉退守益州一隅,三国鼎立之势基本定局。 Guan Yu lost Jingzhou, Liu Bei regardless of the opposition of the ministers, regardless of “Longzhong on the” outside “Sun Quan” principle, from the army of the Empress Dowager Dong Wu, the result of Yi Ling defeat, leading to Shu national strength Loss, Liu Bei also died in Baidi. Since then, Shu Han retreat Yichang corner, the three countries set the trend of the basic set.