|Bolo Mark||XV/R (Horrendous)|
|Year of Introduction||2626|
1x 50cm Hellbore
4x 20cm BL mortars
4x 18cm BL mortars
12x gatling laser Infinite Repeaters
The Model R was the final variant of the Mark XV . Main armament was upgraded to one 50cm Hellbore (which, unlike earlier models' weapons, could engage spacecraft in low orbit even from within a planetary atmosphere), and ablative armor appliqués were fitted over the Model R's flintsteel war hull in light of increases in infantry and light-vehicle energy weaponry. The preceding Model Q had seen vastly upgraded EW capabilities and the first appearance of heuristic cybernetics designed to run continuous analyses of pre-loaded battle plans against actual battle conditions in order to suggest improvements to its distant human commander. Under express human pre-battle authorization, the Mark XV/Q and /R were capable of reconfiguring their battle plans on the move without further human input. Although not self-directed, the final models of the Mark XV gave a very good impersonation of a war machine which was. Weights climbed sharply—the Mark XV/R reached 5,000 tons—but maximum road speed held fairly constant at 65–70 kph, despite weight increases.
Source: A Brief Technical History of the Bolo by Prof. Felix Hermes, Ph.D