what happened after this?
By the end of 209, the post Cao Cao had established at Jiangling fell to Zhou Yu.
Battle of Red Cliffs
By the end of 209, the post Cao Cao had established at Jiangling fell to Zhou Yu. 
where did the battle of red cliffs take place The precise location of the Red Cliffs battlefield has long been the subject of both popular and academic debates, but has never been conclusively established. what is this battle? It unfolded in three stages: an initial skirmish at Red Cliffs followed by a retreat to the Wulinbattlefields on the northwestern bank of the Yangtze, a decisive naval engagement, and Cao Cao's disastrous retreat along Huarong Road. why did this happen? Cao Cao wanted to reunite the sundered Han empire and this place was of vital importance. where was it located? The precise location of the Red Cliffs battlefield has long been the subject of both popular and academic debates, but has never been conclusively established.
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Battle of Red Cliffs [SEP] Aftermath
By the end of 209, the post Cao Cao had established at Jiangling fell to Zhou Yu. The borders of the land under Cao Cao's control contracted about , to the area around Xiangyang . Liu Bei gained territory by taking over the four commanderies (Wuling, Changsha, Lingling and Guiyang) south of the Yangtze River. Sun Quan's troops had suffered far greater casualties than Liu Bei's in the extended conflict against Cao Ren following the Battle of Red Cliffs and the death of Zhou Yu in 210 resulted in a drastic weakening of Sun Quan's strength in Jing Province .