States on the Edge

This episode follows the final collapse of the Warring States as Qin transforms from the strongest kingdom into the power that systematically destroys its remaining rivals.

Han falls first in 230 BCE, followed by Zhao after political manipulation helps remove the capable general Li Mu. Yan, already weakened after Jing Ke’s failed assassination attempt, loses its capital soon afterward, while Wei is defeated through a siege that uses water and engineering as weapons.

Chu proves far more difficult. An early Qin campaign fails, showing that Qin is not invincible. Ying Zheng then turns to the veteran general Wang Jian, whose massive and patient campaign ultimately defeats Chu in 223 BCE.

Yan is eliminated in 222 BCE, leaving Qi isolated in the east. With no effective allies remaining, Qi surrenders to Qin in 221 BCE.

The episode emphasizes that these victories were not created in a few years alone. They were the result of generations of Qin reform, centralized administration, agricultural growth, military organization, diplomacy, espionage, engineering, and the repeated inability of rival states to maintain lasting unity.

By 221 BCE, the Warring States Period is over. Ying Zheng now controls the major Chinese states, but conquest creates a new challenge: turning many former kingdoms into a single political system.

The episode ends as Ying Zheng prepares to abandon the old title of king and take a new one worthy of his achievement—Qin Shi Huang, the First Emperor.