[SunkenCiv]

Vietnam emerged as an independent state (or rather, reemerged) in the Middle Ages, it was a Chinese conquest. :’)

http://www.britannica.com/eb/article-52725/Vietnam

http://www.britannica.com/eb/article-9054731/Nam-Viet

[CarrotAndStick]

Thanks!

The Chinese had tried again in the early 80s. They suffered badly at the hands of the Vietnamese.