When Liu Bei received the frontline battle report, Cao Bao had already been killed, and more than ninety percent of the thirty thousand elite Danyang soldiers had been captured by Cao Cao, taking advantage of the terrain.
Looking at the situation written in the intelligence report, Liu Bei felt that calling Cao Bao an idiot would be an insult to idiots. Thirty thousand elites of Danyang, Tao Gongzu's very own coffin book, were squandered just like that, with even their own lives staked.
It so happened that on that day, Cao Bao led thirty thousand elites straight out of their nest, and after successive victories, Cao Bao forgot who he was. He held Cao Cao in utter contempt, leaving the defense of Pengcheng completely empty, that when Cao Cao departed, he sent five hundred men to take its place without Cao Bao's knowledge.