Success of sticking to self and not listening to slanders: Zhang Liao didn't listen to Ban and Li Dian's words and raided Sun Quan, and finally succeeded, as if it were a battle of cooperation.
Listen to people's advice and fail: Battle of Red Cliffs and Cao Cao listened to Pang Tong's serial plan and suffered a great defeat.
(Specifically, you can Baidu these two campaigns)