In 193, Cao Cao's father Cao Song was travelling through Xu Province to join Cao Cao in Yan Province. Tao Qian's subordinate, Zhang Kai (張闓), attacked the baggage train, killing Cao Song and escaping with the loot. The death of Cao Song prompted Cao Cao, then the Governor of Yan province, to lead an army to invade Xu Province and massacre countl...Read more