Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. One of the most powerful warlords of his time, Yuan Shao spearheaded a coalition of warlords against the tyrannical Dong Zhuo, who held Emperor Xian hostage in the capital Luoyang, but failed due to internal disunity. In 200, he launched a campaign against rival warlord Cao Cao but was decisively defeated at the Battle of Guandu. He died of sickness two years later in Ye. His eventual failure despite his powerful family background and geographical advantages was commonly blamed on his indecisiveness and inability to heed the advice of his advisors.