High Quality Content by WIKIPEDIA articles! The Battle of Yan Ford was a battle that took place along the banks of the Yellow River during the prelude to the Three Kingdoms era of Chinese history. The battle was closely preceded by the Battle of Boma, and was part of series of engagements leading to the decisive confrontation between the rival warlords Yuan Shao and Cao Cao at the Battle of Guandu in 200. Following the death of one of Yuan Shao`s elite generals, Yan Liang, in the previous battle, the death of another famed general Wen Chou in this battle greatly demoralized Yuan`s army, which was heading towards Guandu.