관구검
In early 255, the Wei generals Guanqiu Jian and Wen Qin started a rebellion in Shouchun (壽春; present-day Shou County, Anhui) because they were unhappy with the Sima family's control over the Wei government. Both of them were close to the former Wei regent Cao Shuang and his followers, who were ousted from power in a coup in 249 by Sima Yi. Guanqiu Jian and Wen Qin sent a messenger to Zhuge Dan, urging him to rally troops in Yu Province to support them. However, Zhuge Dan executed the messenger and publicly announced that Guanqiu Jian and Wen Qin had rebelled.