The Battle of Guandu (官渡之战) was fought in 200 CE at Guandu, a strategic point on the Yellow River. Yuan Shao, who controlled the north-eastern provinces and fielded a much larger army, marched south to destroy Cao Cao. Cao Cao held a defensive position and waited for a chance to strike.
Stalemate and supply
The two sides faced each other for months. Yuan Shao’s supply lines stretched north; Cao Cao’s were shorter but still under pressure. Xu You, a former adviser to Yuan Shao who had defected to Cao Cao, advised a raid on Yuan Shao’s supply depot at Wuchao. Cao Cao led the raid in person and burned the supplies.
Collapse of Yuan’s army
With their stores destroyed and morale broken, Yuan Shao’s army fell into disarray. Key generals such as Zhang He defected to Cao Cao. Yuan Shao retreated north with the remnants of his force. He died shortly afterwards; his sons Yuan Tan and Yuan Shang then fought each other, and Cao Cao methodically absorbed their territory.
Aftermath
Guandu made Cao Cao the dominant power in northern China. The Central Plain and the north-east were under his control; the Han emperor remained in his hands. The battle is often cited as a classic example of defeating a stronger enemy through logistics, surprise, and the exploitation of internal weakness.