Enraged at Bu Xie's defeat, the Wu emperor Sun Xiu ordered his general, Lu Kang, to lead 30,000 troops to support Bu Xie and besiege Yong'an. After a six-month-long siege, more than half of Yong'an's population fell sick from infectious diseases. When someone suggested that he break out of the siege and head south towards Zangke Commandery (牂柯郡; covering parts of present-day Guizhou) or head north to Shangyong Commandery (上庸郡; covering parts of present-day northwestern Hubei), Luo Xian refused, stating he was prepared to die defending the city. After Chen Qian relayed Luo Xian's call for help to Sima Zhao, the Wei regent ordered the general, Hu Lie, to lead 20,000 troops from Jing Province to divert Wu forces from Yong'an by attacking Xiling. In July or August 264, Wu forces retreated after failing to capture Yong'an and due to the Wei attack at Xiling. Aftermath Sima Zhao accepted Luo Xian's surrender and ordered him to remain behind and continue guarding Yong'an. Due to his efforts in Yong'an, Wei consolidated their control over Shu's former territories while Wu was unable to make any territorial gain in the wake of Shu's demise. References Chen Shou Chen, Shou (3rd century). Records of the Three Kingdoms (Sanguozhi). Pei Songzhi Pei, Songzhi (5th century). Annotations to Records of the Three Kingdoms (Sanguozhi zhu). Fang Xuanling Fang, Xuanling (ed.) (648). Book of Jin (Jin Shu). 264 260s conflicts Yong'an