Old Book of Tang: Li Shimin crushed Dou Jiande's army at Hulao near Hulao and captured Dou Jiande.; New Book of Tang: At Hulao, Prince Shimin…
Li Shimin crushed Dou Jiande's army at Hulao near Hulao and captured Dou Jiande.
五月己未，秦王大破竇建德之眾於武牢，擒建德，河北悉平。
Location: 舊唐書 卷1 武德4年 5月
At Hulao, Prince Shimin defeated and captured Dou Jiande, and then Wang Shichong surrendered.
秦王世民敗竇建德于虎牢，執之
Location: 新唐書 卷001 高祖 武德4年5月
Place: 虎牢
Show on the map — open Old Book of Tang (Jiu Tangshu), Annals