The Gurun I system, after Mesir IV. This became the first vehicle on vehicle combat of the Artificial wars. These vehicles uses energy itself, meaning shields and armour means nothing. The reason they look similar with Tsardom tanks is because they ARE based on them, remember: the Artificials cannot make original models, and can only steal from others and modify them, but they only copy the looks, not the full model (except traitor soldiers). The living missiles of Mesir are a Scravelin legion who switched sides, they focus on kamikaze missions. Their motto being: Better die as a hero than live as a coward.
(this happened BEFORE part 13) The MAR system are used to cool down the barrels, but looks like we overworked them... (click for next slide)