Battle of Mount Dingjun
218 CE.
Shown on the map at 32.880°, 103.865°.
The Battle of Mount Dingjun was fought between the warlords Liu Bei and Cao Cao in February 219 during the prelude to the Three Kingdoms stretch of Chinese history. Liu Bei's victory in the battle marked a major milestone in his Hanzhong Campaign and allowed him to kill the commander of the Wei's forces, Xiahou Yuan and later taking Hanzhong Commandery.
Text from the Wikipedia article Battle of Mount Dingjun, licensed CC BY-SA 4.0.