There Severus’ army sat, throwing its full force against the beleaguered city in an attempt to storm it. Every kind of siege engine was used against the walls and no technique of siege operation was left untried.
Edition :
Herodian. History of the Empire, Volume I: Books 1-4. Translated by C. R. Whittaker. Loeb Classical Library 454. Cambridge, MA: Harvard University Press, 1969.
Herodian. History of the Empire, Volume II: Books 5-8. Translated by C. R. Whittaker. Loeb Classical Library 455. Cambridge, MA: Harvard University Press, 1970.
Remark :
long-term consequence: Many of Septimius Severus' soldiers did not die from the enemy directly, rather they died of heatstroke and illness. (3.9.6)