Luo Xian
Between September and November 263, when Shu's rival state Wei launched a large-scale invasion of Shu, Yan Yu received orders to lead troops from Badong Commandery to defend Shu from the Wei invaders. Luo Xian remained behind in Yong'an (永安; present-day Fengjie County, Chongqing) with only 2,000 troops.