Battle of Kunyang (23) — the same event in Book of the Later Han and Zizhi Tongjian

Book of the Later Han: Guangwu, with 3,000 death-defying troops, struck the central army of Wang Xun and Wang Yi on the western riverbank of Kunyang…

What each source says

Book of the Later Han (Hou Hanshu), Annals · AD 23 · 昆陽

Guangwu, with 3,000 death-defying troops, struck the central army of Wang Xun and Wang Yi on the western riverbank of Kunyang city, killed Wang Xun, and Wang Mang's army suffered a crushing defeat.

光武乃與敢死者三千人,從城西水上衝其中堅,尋、邑陳亂,乘銳崩之,遂殺王尋。
Location: 後漢書卷1上 光武帝紀上 更始1年

Zizhi Tongjian (Comprehensive Mirror) · AD 23 · 昆陽

In the sixth month, on the day jiwei, the first day of the moon, Liu Xiu, with about a thousand Baoji men, led the vanguard, camped four or five li ahead of the main army, and cut down several thousand sent by Wang Xun and Wang Yi. The commanders were amazed at his bravery.

六月,己卯朔,秀與諸營俱進,自將步騎千餘為前鋒,去大軍四五里而陳;尋、邑亦遣兵數千合成,秀奔之,斬首數十級。
Location: 資治通鑑 卷039 (원문 단락 #2840, 23년)

Where the sources differ

A and B are two of the sources listed above.

On what pointSource ASource BWhat differs (in Korean)
NumbersBook of the Later Han (Hou Hanshu), AnnalsZizhi Tongjian (Comprehensive Mirror)a는 결사대 3천, b는 선봉 천여 명
Show on the map — open Book of the Later Han (Hou Hanshu), Annals