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Introduction to major battles: The pictures on display in the hall mainly reflect Cao Cao's military career and his wonderful military art. The exhibition room displays battle maps and analysis materials of Cao Cao's several major battles. Among them, the famous ones include the "Battle of Guandu" and "Battle of Baimajin" with Yuan Shao; the "Battle of Chibi" with the Wu and Shu allied forces; the "Battle of Ruxu" with Prime Minister Cao's Mansion in Xuchang, Eastern Wu; and the battle with Ma Chao, Guanzhong, Han Sui's "Battle of Guanzhong"; "Battle of Hefei" (i.e. Battle of Xiaoyaojin) with Soochow; "Battle of Hanzhong" with Shu; "Battle of Hanzhong" with Zhang Lu; Guan Yu's "Battle of Xiangfan".