Emperor Ai of Tang
In 904, Zhu forced Emperor Zhaozong to move the capital from Chang'an to Luoyang, which was even more firmly under his control. Later that year, fearing that the adult Emperor Zhaozong would try to rise against him while he was away on campaigns against other warlords, he had Emperor Zhaozong assassinated. Bypassing Li Yu and the other older princes, he had an edict issued in Emperor Zhaozong's name creating Li Zuo crown prince and changing his name to Li Chu. Shortly after, Li Chu took the throne (as Emperor Ai). Empress He, who survived the assassination, was honored empress dowager.
Huang Chao
Although Huang Chao was one of many rebel leaders in Chinese history, the impact of his rebellion can be compared to that of Taiping Rebellion or the Yellow Turbans. Huang Chao's rebellion greatly weakened Tang and it eventually led to the demise of the Tang dynasty in 907, by Huang Chao's former follower Zhu Wen, when he usurped the throne from Emperor Ai of Tang and initiating several decades of civil war called the Five Dynasties and Ten Kingdoms period.