At Hulao, Prince Shimin defeated and captured Dou Jiande, and then Wang Shichong surrendered. (New Book of Tang (Xin Tangshu), Annals 新唐書 卷001 高祖 武德4年5月)
Li Xiaogong, Prince of Zhao, defeated and captured Xiao Xian at Jingzhou; the Liang state was destroyed. (New Book of Tang (Xin Tangshu), Annals 新唐書 卷001 高祖 武德4年10月)
In the second month of the twenty-ninth year, Prince Umayado dies at Ikaruga palace, and everyone grieves as if they had lost their young children (Nihon Shoki (Chronicles of Japan) 日本書紀 卷第廿二 推古紀 29年 단락153)
In December 621, Liu Heida builds an altar southeast of the city, sacrifices to Heaven and to Dou Jiande, and enters; ten days later he leads his army to attack and take Xiangzhou, captures governor Fang Huang, while Zhang Shigui breaks out of the encirclement and flees. (Zizhi Tongjian (Comprehensive Mirror) 권189 621년 항)