The Battle of Mt. Ding Jun was a battle between the forces of Liu Bei and Cao Cao. Liu Bei was seeking to control the culturally vital Han Zhong region, as well as open a path into Wei, while Cao Cao was trying to stop him. The two archers Huang Zhong and Xiahou Yuan developed a rivalry here, ending with Huang Zhong and his forces slaying Xiahou Yuan, and driving out Wei.
The series highlights the efforts of the generals Huang Zhong and Xiahou Yuan. In all games in which the battle appears, a small rivalry takes place over the battle between the two. Some installments have them exchange insults during the battle, while others have a cutscene prior to the battle, and when the two generals meet. In the end the player has the power to decide the ultimate victor, although normally their duel is left alone, the opposing general to the player's force will claim victory. In the sixth installment a new mountain was added named Mt. Cha Qi. If using either Shu or Wei, Xiahou Yuan or Huang Zhong will capture Mt. Cha Qi depending who is your ally. If Mt. Cha Qi is captured, the rival general will attack Mt. Cha Qi and the ally general will defend the mountain starting the famous one-on-one battle of Xiahou Yuan and Huang Zhong.
Edit
