Hatra (198) — the same event in Cassius Dio and Herodian, History of the Empire

Cassius Dio: Severus crossed Mesopotamia and attacked Hatra, but his siege engines were burned and he lost many soldiers and withdrew; Cassius Dio…

What each source says

Cassius Dio, Roman History · AD 198 · Hatra

Severus crossed Mesopotamia and attacked Hatra, but his siege engines were burned and he lost many soldiers and withdrew

Severus now crossed Mesopotamia and made an attempt on Hatra, which was not far off, but accomplished nothing;
Location: 76(75).10.1

Herodian, History of the Empire · AD 198 · Hatra

Severus besieges Hatra in Mesopotamia, but the city is strong and he withdraws with only losses.

Location: 3.9

Cassius Dio, Roman History · AD 199 · Hatra

Severus attacked Hatra again with large stocks of food and siege engines, but Arab cavalry and bitumen (naphtha) attacks destroyed many engines and soldiers

He himself made another expedition against Hatra, having first got ready a large store of food and prepared many siege engines;
Location: 76(75).11

Where the sources differ

A and B are two of the sources listed above.

On what pointSource ASource BWhat differs (in Korean)
OutcomeCassius Dio, Roman HistoryHerodian, History of the Empirea는 공성기와 병사 대량 손실, b는 손해만 입고 철수

Place: Hatra

Show on the map — open Cassius Dio, Roman History