After Crown Prince Qi became emperor (as Emperor Jing) in 157 BC, a military emergency did arise. Concerned that the princes of collateral lines of the imperial clan were becoming overly powerful, Emperor Jing, based on the advice of
Chao Cuo, attempted to reduce the size of the principalities. Seven principalities, led by the powerful principalities of Wu (modern southern
Jiangsu, northern
Zhejiang, southern
Anhui, and northern
Jiangxi) and Chu (modern northern
Jiangsu and northern
Anhui) rebelled in a war later known as the
Rebellion of the Seven States. In accordance with Emperor Wen's instructions, Emperor Jing made Zhou the commander of the armed forces. At that time, the Wu and Chu forces were fiercely attacking the
Principality of Liang (modern eastern
Henan), whose prince
Liu Wu was Emperor Jing's younger brother. Emperor Jing ordered Zhou to immediately head to Liang to save the principality. Zhou refused to specifically follow that instruction, reasoning that the proper strategy would involve first cutting off the Wu and Chu supply lines, thus starving them. So he headed to the north-east of Liang and around the Wu and Chu forces to cut off their supplies. The strategy was effective. Wu and Chu, unable to capture Liang quickly and realizing that their supplies were dwindling, headed north-east to attack Zhou. After being unable to get a decisive victory against Zhou, the Wu and Chu forces collapsed from starvation. Liu Pi fled to
Donghai, but the citizens killed him and sought peace with Han.
Liu Wu, the prince of Chu, committed suicide. The other principalities involved were all eventually defeated. Zhou's effective strategy was praised and admired by the other generals, but not by the wealthy
Prince Wu or his powerful mother, the
empress dowager Dou, who would bear a grudge against Zhou for the rest of their lives because of Zhou's refusal to save him first. == Post-Rebellion career ==