 However, Liu Yan's forces were able to successfully defend their territory from being ravaged.In 194, when Li Jue and Guo Si gained control of Chang'an after Dong Zhuo's death, three of Liu Yan's sons (Liu Fan, Liu Dan, and Liu Zhang) were in Chang'an serving in various government posts.Liu Yan joined forces with Han Sui and Ma Teng in an attempt to attack the capital and seize it.