Gyerim (674) — the same event in Old Book of Tang, Samguk Yusa and Zizhi Tongjian

Old Book of Tang: Liu Rengui was appointed Grand Commander of the Gyerim Route and sent to attack Silla.; Samguk Yusa: In the second month the Tang…

What each source says

Old Book of Tang (Jiu Tangshu), Annals · AD 674 · 雞林

Liu Rengui was appointed Grand Commander of the Gyerim Route and sent to attack Silla.

五年春二月壬午,遣太子左庶子、同中書門下三品劉仁軌為雞林道大總管,以討新羅,仍令衛尉卿李弼、右領大將軍李謹行副之。
Location: 舊唐書 卷5 咸亨5年 2月

Samguk Yusa (Memorabilia of the Three Kingdoms) · AD 674

In the second month the Tang made Yu Inkwi the commander of the Gyerim route to attack Silla (there were signs that the Tang troops, staying behind, would strike Silla).

上元元年甲戌二月。劉仁軌為雞林道總管。以伐新羅
Location: 紀異第二 文虎王法敏

Zizhi Tongjian (Comprehensive Mirror) · AD 674

In January 674 (Renwu day), Liu Renkui is made Grand Commander of the Gyerim route, with Li Bi and Li Jinxing as deputies, and sent with troops to attack Silla.

春,正月,壬午,以左庶子、同中書門下三品劉仁軌為雞林道大總管,衛尉卿李弼、右領軍大將軍李謹行副之,發兵討新羅。
Location: 권202 674년 항

Where the sources differ

A and B are two of the sources listed above.

On what pointSource ASource BWhat differs (in Korean)
YearSamguk Yusa (Memorabilia of the Three Kingdoms)Zizhi Tongjian (Comprehensive Mirror)a는 674년 2월, b는 674년 정월
Show on the map — open Old Book of Tang (Jiu Tangshu), Annals