In 154 BCE, seven regional kingdoms rebelled against the Han imperial government. The kingdoms had originally been created to protect the new dynasty. Now they had become its most dangerous internal rivals.

Why did the early Han grant enormous territories to regional kings—and then spend decades taking their power away?

This episode examines a political arrangement born from weakness. Liu-family kings initially offered military support and dynastic security, especially during the succession crisis surrounding Empress Lü. But as the central government grew stronger, their territories, revenues, officials, and armies became increasingly difficult to tolerate.

Emperors Wen and Jing responded through inheritance rules, territorial subdivision, confiscation, centrally appointed officials, and finally military force. Centralization was neither inevitable nor automatically beneficial: taxation, labor service, military duty, and civil war continued to impose real costs on ordinary households.

The kingdoms solved an immediate problem for the early Han—and created a new one for the stronger empire that followed.

Based primarily on The Cambridge History of China. How China Became China is an independent educational production by China Through Stories and is not affiliated with or endorsed by Cambridge University Press.