Battle of Guandu
Later in 200, before the Battle of Guandu, Tian Feng analysed the situation, advised Yuan Shao to fight a long-term war against Cao Cao and pointed out how it would work to Yuan Shao's advantage. When Yuan Shao refused to listen, Tian Feng repeatedly attempted to push his ideas through. Yuan Shao, thinking that Tian Feng was trying to dampen his troops' morale, became furious and ordered Tian Feng to be put in chains and thrown into prison.