The following year, Cao Rui sent Sima Yi with 40,000 men to attack Liaodong. Upon hearing this, Gongsun again requested aid from Eastern Wu. Sun, angry at Gongsun's previous betrayal, pretended to agree, but did not send Gongsun any actual help. Although Sima's expeditionary force was also initially halted by torrential rains as Guanqiu's was, Sima waited out the rains and eventually surrounded Gongsun's capital of Xiangping (襄平, in modern Liaoyang, Liaoning), starving Gongsun's troops. After nearly three months of siege, Xiangping fell, and Gongsun fled, but was captured and executed by Sima. Liaodong became part of Cao Wei's domain.