Guanggu (356) — the same event in Book of Jin and Zizhi Tongjian

Book of Jin: Murong Ke attacked Duan Kan at Guanggu.; Zizhi Tongjian: In the first month of spring, Yan Prince Tai Yuan Ke led his army across the…

What each source says

Book of Jin (Jinshu), Imperial Annals · AD 356 · 廣固

Murong Ke attacked Duan Kan at Guanggu.

慕容恪攻段龕於廣固
Location: 晉書 卷008 帝紀 永和12年10月

Zizhi Tongjian (Comprehensive Mirror) · AD 356 · 廣固

In the first month of spring, Yan Prince Tai Yuan Ke led his army across the Yellow River; before reaching Guanggu by a hundred li, Duan Kan met him with thirty thousand and fought.

春,正月,燕太原王恪引兵濟河,未至廣固百餘里,段龕帥眾三萬逆戰。
Location: 卷100 356년 단락0 제1문

Place: 青州

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