Liang Shidu

Liang Shidu was a claimant to title of Emperor of China who rebelled against the rule of the Chinese Sui dynasty near the end of the reign of Emperor Yang of Sui. Liang Shidu claiming the title of Emperor of Liang with the aid from Eastern Turkic Khaganate retained the modern northern Shaanxi and western Inner Mongolia region for over a decade, but was gradually weakened by attacks from the Tang dynasty, whose founding emperor Emperor Gaozu and successor Emperor Taizong had eliminated the rival contenders for power one by one, leaving Liang isolated. In 628, with the Eastern Turks in internal turmoil and unable to come to his aid, Emperor Taizong launched another attack on Liang. Liang's cousin Liang Luoren (梁洛仁) assassinated him and surrendered, completing Tang's drive to reunite China after Sui's collapse.