Dulles was left with the 12 carroballistas. He had to assemble some people to operate them.
Dulles's carroballista unit which totaled around 65 people with 60 assigned to the 12 ballistas and the remaining five including Dulles acting as messenger troops which were in charge of relaying orders within the group for them to be able to effectively function as a unit. Even though each only required three men to operate, Dulles had up to five people on one and cited that the larger chariots allowed for more people to be on board and the extra two could help with shielding the rest from enemy fire or stabbing enemies with halberds, thus effectively increasing the defensive and close combat capabilities of each unit. The extra people also allowed for the injured to switch out with someone else to retain the core functionality of the carroballistas, ensuring that their assault wouldn't be stopped halfway just because one or two men got injured from enemy resistance.
The heavily-armored infantry division would only be able to show their best performance when acting in concert with the carroballista division, defending as the latter attacked.
The problem was that each carroballista required two horses to move it around swiftly so they could be stationed around the battlefield with ease. Without war horses, the steel ballistae couldn't be moved around the battlefield and stationing them would be quite troublesome. The ballistae wouldn't be able to fire at short notice in that case.
Dulles's carroballista division was restructured by Lorist into three brigades of 9000 men. The steel ballistas had replaced the longbow troops as the main ranged attacking force of the family and Lorist didn't intend to change that.
Lorist prepared a division's worth of wheelbarrow ballistae for Dulles. That fellow was getting impatient to be a division commander. Malek was to arrange for half the troops of the carroballista division to join Dulles's new wheelbarrow-ballista division. Having the new recruits fill up the vacancies.'