Cáo Cāo was a regional warlord and the second last Chancellor of the Eastern Han Dynasty who rose to great power during its final years in ancient China. As one of the central figures of the Three Kingdoms period, he laid down foundations for what was to become the Kingdom of Wei (also known as Cáo Wèi) and was posthumously titled Emperor Wu of Wei. Although often portrayed as a cruel and merciless tyrant, … Wikipedia
The definitive Wikipedia entry for Cao Cao. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Cao_Cao