Map of Hunnic expansion westward and Inner Asian expansion into China 4th C. CE

"There are broadly speaking five possible operations for any army. If you can fight, fight. If you cannot fight, defend. If you cannot defend, flee. The two remaining operations include only surrender and death. If you are not willing to face bondage, then all that is left for you is to die and spare your family of the ransom."

— Sima Yi, The Book of Jin Vol.1 

Source:

https://www.cambridge.org/core/books/abs/huns-rome-and-the-birth-of-europe/huns-in-central-asia/5D55D02BAA40B7232E24288CC93595EA

Quote:

https://en.wikipedia.org/wiki/Military_history_of_the_Three_Kingdoms