竇建徳
Similarly, during the earlier Sui–Tang transition, numerous regimes established by rebel forces vied for control and legitimacy as the power of the ruling Sui dynasty weakened. Autonomous regimes that existed during this period of upheaval included, but not limited to, Wei (; by Li Mi), Qin (; by Xue Ju), Qi (; by Gao Tancheng), Xu (; by Yuwen Huaji), Liang (; by Shen Faxing), Liang (; by Liang Shidu), Xia (; by Dou Jiande), Zheng (; by Wang Shichong), Chu (; by Zhu Can), Chu (; by Lin Shihong), Yan (; by Gao Kaidao), and Song (; by Fu Gongshi). The Tang dynasty that superseded the Sui launched a decade-long military campaign to reunify China proper.