《旧唐书·本纪·卷二十》
二月，汴州的军队在东阿把兖州、郓州的军队打得大败，王宣州、瑾州的形势危急，向太原求救，李克用派兵去救援。
二月，汴人大败兗、郓之军于东阿，瑄、瑾势蹙，求援于太原，李克用出师援之。
In the second month, the Bianzhou army routed the armies of Yanzhou and Yizhou at Dong'a, and the situation of Xuanzhou and Jinzhou became critical, causing them to seek help from Taiyuan. Li Keyong sent troops to their rescue.