Red Cliffs, a historic location in Hubei province; specifically the site of the famous Battle of Red Cliffs in 208 AD between 孙权 sūn​quán and 刘备 liú​bèi against 曹操 cáo​cāo

Connects a describing word or phrase to the noun it describes, similar to 的 de but used in formal or literary writing.

war; warfare; battle; to fight a battle