I've got a question, is the Battle of Red Cliff another name for the Battle of Chi Bi?... Secondly, Guan Yu joined Cao Cao at Guan Du out of debt for Cao Cao allowing him to live, while fighting(and killing) Wen Chou and Yan Liang Guan Yu saw Liu Bei and left the battlefield because he had paid his debt to Cao Cao. To Mr.History, Zhang Fei was killed before the battle of Fan Castle(where Cao ren was stationed) and Guan Yu was actually killed by the Wu forces(Lu Meng) that allied with Wei(Cao Ren) to defeat Guan Yu...