In 207, Cao Cao personally led his forces on a campaign against Yuan Shang and the Wuhuan tribes. By the time the Wuhuan realised that Cao Cao was on his way to attack them, it was a little too late but they still managed to muster thousands of horsemen to fight the enemy.
In 207, Cao Cao personally led his army against Yuan Shang and the Wuhuan tribes. By the time the Wuhuan became aware that Cao Cao's forces were approaching, it was too late for them to prepare but they still managed to assemble a large force of horsemen to resist the enemy.