Battle of Luoyang (762) — the same event in Old Book of Tang and New Book of Tang

Old Book of Tang: Prince Yong Li Kuo crushed Shi Chaoyi's army at Hengshui and killed or captured 60,000; all the prefectures and counties of Hebei…

What each source says

Old Book of Tang (Jiu Tangshu), Annals · AD 762 · 洛陽

Prince Yong Li Kuo crushed Shi Chaoyi's army at Hengshui and killed or captured 60,000; all the prefectures and counties of Hebei were pacified.

甲戌,戰於橫水,賊大敗,俘斬六萬計。
Location: 舊唐書 卷11 寶應1年 10月

New Book of Tang (Xin Tangshu), Annals · AD 762 · 洛陽

Li Kuo, Prince of Yong (later Emperor Dezong), defeated Shi Chaoyi at Hengshui and recovered Heyang and the Eastern Capital.

甲戌,敗史朝義于橫水,克河陽、東都
Location: 新唐書 卷006 肅宗·代宗 寶應1年10月

Place: 洛陽

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