Ballista quadrirotis is a weapon that Roman troops could have used. Information about this weapon appears in the anonymous work “De rebus bellicis” from the 4th-5th century CE. It presents the weapon as a ballista mounted on a four-wheeled cart and pulled by horses, which allowed it to be mobile on the battlefield.
“De rebus bellicis” from the 4th-5th century CE presents various military innovations of the period; however, we do not know whether the described weapon was actually used or was only intended to encourage Roman authorities to invest in the army.
