|Battle of Xia Pi|
The Battle of Xia Pi (184) was an engagement between the Han Dynasty army of Huangfu Song plus other forces led by Liu Bei, Cao Cao, and Sun Jian, and the Yellow Turbans under command of Zhang Liang. Though the Yellow Turbans had the numerical advantage, they broke out of the castle and killed the enemy leader.
Cao Cao and Sun Jian were on the west and east walls, respectively, while Liu Bei was in charge of the southern wall. Huangfu Song ordered the allied forces to break out and defend the castle walls. The Yellow Turbans had Guan Hai, Huang Shao, Cheng Yuanzhi, Yan Zheng, and Zhang Mancheng under their control. Mancheng was near the enemy base camp, while the others attacked the walls. The Han forces broke out, and defeated a turban ambush unit led by He Yi. Now, Zhang Liang was alone in the face of the onslaught and was defeated.