Techpriest Enginseer BERP (Basic Engineering Repair Protocol) was distracted. Assigned to the artillery company of the 555th Regiment, Cadia, he was in his first major battle. His dendrite connector cords sniffed the air around him, the air palpable with the distinct odor of ozone - the remnants of the plasma blast that had only moments below erupted on the Manticore before him and had nearly thrown him to the ground.
Behind him, a Wyvern issued another four satisfying krumps in rapid succession, sending the blessed explosive shells of destruction downrange to the enemy positions. BERP strove to reawaken the Manticore's engine, his mind reaching out for the Manticore's spirit for guidance. It could, he see, keep firing, it just could not move. Some sort of electrical discharge from the blast had immobilized the vehicle. BERP barely cringed as another large blast from the Tau hit the Command Chimera nearby - and with smoke pouring up from that vehicle, the command squad of the artillery company exited the vehicle and sheltered behind it. The Wyvern behind him was also damaged in that same blast and it now called for attention. BERP moved over to it and connected to the Wyvern. His mind now reached into the stricken vehicle and he attempted another repair. The Manticore fired another large artillry rocket at the enemy off in the distance.
Nothing seemed to work right under these conditions thought BERP. Another plasma blast now bloomed overhead, showering BERP with debris. The Wyvern itself stopped all functions. BERP looked at the open firing platform and saw the crew were all dead or on fire. BERP frowned, wrinkling his one remaining eyebrow. Whith what passed for a sigh, he disconnected from the wrecked Wyvern and turned his attention back to the Manticore. It, at least, was still capable of firing, thought BERP. He observed it had one missile left in its racks. Soon, BERP would move to the next artillery piece. Servitors and a recovery vehicle were ordered with the mere thought, to come forward and recover the Manticore for repair and rearming.
Nearby, the Artillery Company Commander and his subbordinates were all yelling into different communications systems, and the battle was continuing. BERP was somewhat grateful for his location behind as solid concrete structure. On one hand, he wanted to collect data on this enemy, the Tau. On the other hand, his program was to see to and repair the artillery throughout the battle. BERP mused that in due time, with Victory won, we could be afforded the chance to collect data on the Tau's military technology. Until then, he would perform his function.
(yes, in part due to the attached Artillery Company Formation, the 555th beat a Tau force at 1750 points. It was fun...)