"another campaign" . . "Decisive but temporary Cao Cao victory" . . "to help" . "campaign" . "Han dynasty" . "attacked" . . . "attacked Xu Province" . "attack" . . . . . . . "Massacre of Xuzhou" . "attacking" . "Tian Kai" . "launching an invasion" . "came under attack" . "Cao Cao" . . "Invasion of Xu Province" . . . . "More than 5,000" . "a campaign" . . . "invaded Xu Province" . . "Cao Cao's invasion of Xu Province" . "Tao Qian" . "Cao Cao's invasion of Xu Province" . . .