Meng Da
In 220, Meng Da, a general who formerly served the warlord Liu Bei, defected over to Liu's rival Cao Pi, who had inherited the title of a vassal king – "King of Wei" – from his recently deceased father, Cao Cao. Meng Da brought along his subordinates and their families, numbering over 4,000 in total. Cao Pi was pleased when he heard that Meng Da had come to join him, and he gave Meng a warm welcome. Cao Pi appointed Meng Da as the Administrator (太守) of Xincheng (新城) Commandery, which was located along the southwestern border of Wei.