Meng Da
Meng Da was deeply favoured by Cao Pi, and he was also close friends with the Wei officials Huan Jie and Xiahou Shang. When Cao Pi died in 226, Huan Jie and Xiahou Shang had also died. Meng Da started feeling uneasy because he had been on the front line for a long time. Throughout Meng Da's service in Xincheng, he had been friendly with Eastern Wu (a state founded by Sun Quan) and had established strong defences against possible attacks from Wei's rival state Shu Han (founded by Liu Bei). Shu's chancellor-regent, Zhuge Liang, hated Meng Da for being capricious, and was also worried that Meng would become a threat to Shu.