The battle of red cliffs happened in the famous Three Kingdoms era, and the battle did settle the foundation for the situation. At the time the Shu(蜀) and Wu(吴) who were south of Wei(魏) were alliances so you could say it was a battle between south and north, but when we talk about it was more like a mexican standout sort of thing(if that makes sense to you).
Not an entire war but I’ve definitely seen the battle of red cliffs cast as a definitive battle between the north and south.
The battle of red cliffs happened in the famous Three Kingdoms era, and the battle did settle the foundation for the situation. At the time the Shu(蜀) and Wu(吴) who were south of Wei(魏) were alliances so you could say it was a battle between south and north, but when we talk about it was more like a mexican standout sort of thing(if that makes sense to you).