Battle of Huoyi (617) — the same event in History of the Northern Dynasties, Book of Sui and New Book of Tang

History of the Northern Dynasties: At Huoyi, the Duke of Tang defeated Song Laosheng, killed him, and opened the road to Chang'an.; Book of Sui: At…

What each source says

History of the Northern Dynasties (Beishi), Annals · AD 617 · 霍邑

At Huoyi, the Duke of Tang defeated Song Laosheng, killed him, and opened the road to Chang'an.

辛巳，唐公破武牙郎將宋老生於霍邑，斬之
Location: 北史 卷12 大業13年

Book of Sui (Suishu), Imperial Annals · AD 617 · 霍邑

At Huoyi, the Duke of Tang defeated the Wuya Langjiang Song Laosheng and beheaded him.

唐公破武牙郎將宋老生於霍邑，斬之
Location: 隋書 卷004 帝紀 大業13年8月

New Book of Tang (Xin Tangshu), Annals · AD 617 · 霍邑

At Huoyi he defeated the Sui general Song Laosheng.

辛巳，敗宋老生于霍邑
Location: 新唐書 卷001 高祖 大業13年8月

Place: 彘

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