Han Xin wrote:Obviously Liu Biao was pretty old (I think he was in his 70) when he did die and I don't think he is another Chong Er that could built a great nation in his 70.
I said assuming Liu Biao could live on. He died during when Cao Cao invaded. Let's just say he lived on for another year or so. Don't need to be like Chong Er or Bai Lixi.
Han Xin wrote:However, from SGZ it seem that Liu Bei was very confident of holding off Cao Cao's southward advance before he realised that Liu Zong had surrender. Liu Zong's surrender had virtually kills any really attempts by Liu Bei to effectively defend northern Jing. Cao Cao's troops were already worn out so even if Cao Cao's outnumberred his enemy by about 3 to 1, he could not really guarantee victory if Jing had not surrender, no matter how great a millitary genius he is.
I agree to the statement that victory for Cao Cao could not be guaranteed. This is especially so when Jing province had capable generals like Kuai Yue and Wen Pin.
Han Xin wrote:So the true question is what if Liu Zong had not surreder? If Liu Zong had not surrender, Jing would definately not be lost (may be some small cities in the north) and Liu Bei woud definately have a stronger base to start. However, I still feel that he (Liu Bei) would end up killing Liu Biao's family anyhow...

Not necessary. In some ways, I find that this statement of yours contradicted your earlier statement. Here, you say that Liu Zong could definitely hold Jing Zhou if he did not surrender. Earlier you mention that a victory could not be guaranteed for Cao Cao if Liu Zong did not surrender (this does not mean that a victory is not possible). Sorry for being so particular.
Anyway, I've some points to add to the scenario that you presented.
In the beginning, Liu Bei was based at the city of Fan if I'm not wrong. When Cao Cao advanced south, his troops might be tired but their morale might not be low. Also, the battle at Jing Zhou was mostly land-based and not river-based. Hence, the number of factors against Cao Cao initially were actually not that many. In addition, during Liu Biao's time, Liu Bei was not fully trusted. Hence, the number of troops assigned to Liu Bei might not be that many. Given some of Liu Bei's marvellous records against Cao Cao, there was a chance that he would be defeated once more (his situation against Cao Cao before Guan Du could be better and he lost).
Another point is the conflict between Liu Zong and Liu Qi. Would the two brothers stood hand-in-hand against their "common northern enemy"??
Lastly, would the officers respect Liu Zong? Many of them, including the most notable one Kuai Yue, already adviced Liu Zong to surrender. Note that in some of their advices, they even praised Cao Cao and regarded him as the representative ruler of China.
With that, I would say that the situation with Liu Biao was largely different than the one without. Liu Biao, to a large extent, could overcome some of the difficulties Liu Zong might face if the latter did not surrender. That would make resistance against Cao Cao a lot easier.
