Tanzhou (1276) — the same event in History of Song and History of Yuan

History of Song: From the first year of Jingyan, in the tenth month, the Yuan besieged Tanzhou; Li Fu defended it for three months, but the garrison…

What each source says

History of Song (Songshi), Annals · AD 1276 · 潭州

From the first year of Jingyan, in the tenth month, the Yuan besieged Tanzhou; Li Fu defended it for three months, but the garrison chiefs Wu Jiming and others surrendered by handing over the city.

德祐二年春正月丁卯朔,大元兵自元年十月圍潭州,湖南安撫兼知州李芾拒守三月,大小戰數十合,力盡將破,芾闔門死,郡人知衡州尹穀亦舉家自焚,帥司參議楊霆及幕屬陳億孫、顏應焱等皆從芾死。
Location: 宋史卷047 瀛國公

History of Yuan (Yuanshi), Annals · AD 1276 · 潭州

Tanzhou fell; the Song pacification commissioner Li Fu and his whole family threw themselves into the fire and died.

十三年春正月丁卯朔,克潭州,宋安撫使李芾盡室自焚死。
Location: 元史 卷9 世祖 1276年 1月

Where the sources differ

A and B are two of the sources listed above.

On what pointSource ASource BWhat differs (in Korean)
OutcomeHistory of Song (Songshi), AnnalsHistory of Yuan (Yuanshi), Annalsa는 수장 오계명 등이 바침, b는 함락 후 이비 자결

Place: 長沙

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