[Why] Early Han enfeoffment of imperial kinsmen had let large vassal states such as Wu and Chu grow until they threatened the center. Emperor Jing adopted Chao Cuo's "reduce the vassals" policy, provoking a fierce rebellion among the kings. [What] Liu Pi of Wu allied with Chu, Zhao, Jiaoxi, Jiaodong, Zichuan, and Jinan — seven kingdoms in all — under the slogan "Clear the emperor's flank and execute Chao Cuo." Emperor Jing dispatched the general Zhou Yafu, who routed the rebel armies thoroughly within three months. [Who] General Zhou Yafu was the core commander of the suppression, winning a decisive victory through a strategy of strong fortification and severed supply lines. The censor-in-chief Chao Cuo was the architect of the reduction policy and ended a tragic political sacrifice. [How] The swift pacification entirely dissolved the imperial kinsmen's substantive threat to the center and marked the final consolidation of Han central authority. It laid the crucial groundwork for Emperor Wu's grand ambition and institutional unification.
Why
The historic event of Seven Kingdoms Revolt represents a key developmental peak of the Huaxia dynastic system. The decisive triumph of Han central authority over the regional vassal kings. By establishing this moral or administrative benchmark, it continues to shape the structural and philosophical fabric of ancient Chinese statecraft.