曹操二十余岁时征讨黄巾军,以为国家讨贼立功为本愿,从此纵横马上近四十年,几乎无一岁不出征,可惜终究未能一统江山。若论原因,最直接是看军事,击败袁绍后,曹操至少有两次统一天下的机会——赤壁以及汉中之役。其中赤壁之战前夕是他最接近统一的时刻。当时北方初定,荆州投降。被他视为心腹之患的刘备一路逃亡,只剩下江东政权摇摆不定。从曹操写给孙权的信来看,他颇有己视江东为 At the age of twenty, Cao Cao consulted with the Yellow Turban Army, thinking that the country was discussing the merits of the thieves as its motto, and almost four decades have passed since then. Almost no year-olds are not expeditionary, but after all they have failed to unify the country. If the reason, the most direct is to look at the military, after defeating Yuan Shao, Cao Cao at least twice the chance to unite the world - the battle of Red Cliff and Hanzhong. One of the eve of the Battle of Red Cliff is his closest time to unity. At the beginning of the north, Jingzhou surrendered. Liu Bei, whom he regarded as a confidant, fled all the way and only the Jiangdong regime was vacillating. From the letter Cao wrote to Sun Quan, he quite considered Jiangdong