Sima Lun
After Empress Jia falsely accused Crown Prince Yu of crimes and deposed in 299 and then further murdered him in 300, she was overthrown by Emperor Hui's granduncle Sima Lun the Prince of Zhao. Sima Lun then usurped the throne in 301. Suspecting three key princes—Sima Ying, Sima Jiong the Prince of Qi (Emperor Hui's cousin and the son of Emperor Hui's uncle, Prince You of Qi), and Sima Yong the Prince of Hejian (the grandson of Emperor Hui's great-granduncle Sima Fu the Prince of Anping), each of whom had strong independent military commands—Sun sent his trusted subordinates to be their assistants. Prince Jiong refused and declared a rebellion to restore Emperor Hui. At Lu's suggestion, Sima Ying declared for the rebellion as well, and as Sima Jiong's forces were stuck in a stalemate against Sima Lun's troops, Sima Ying defeated the other wing of Sima Lun's forces, causing them to collapse. As Sima Jiong and Sima Ying's forces approached Luoyang. Sima Lun was captured by officials in Luoyang who declared for the rebellion as well, and forced to issue an edict returning the throne to Emperor Hui. He was then forced to commit suicide. The associates of Sima Lun were executed.