He may have suggested Wang Lung use his daughter Diao Chan to bring down a mutual rival, and before the discovery of the Yinqueshan Han Strips, this man's commentaries on The Art of War served as its 
He may have suggested Wang Lung use his daughter Diao Chan to bring down a mutual rival, and before the discovery of the Yinqueshan Han Strips, this man's commentaries on The Art of War served as its primary source material. After leading the campaigns against (*) Dong Zhuo, he used emperor Xian to support his wars in the north, which led to victory of Yuan Shao at the Battle of Guandu. Despite drastically outnumbering Sun Quan and Liu Bei, this man lost the Battle of Red Cliffs, dooming his Kingdom of Wei to mismanagement. For 10 points, identify this figure of China's Three Kingdom's period, considered the epitome of ruthless cunning in Chinese history.
He may have suggested Wang Lung use his daughter Diao Chan to bring down a mutual rival, and before the discovery of the Yinqueshan Han Strips, this man's commentaries on The Art of War served as its primary source material.
{Cao Cao} [or {Wu of Wei}]