Introduced on the eve of the Human-Melconian 'Last War', the Mark XXX was the direct descendant of the Mark XXVIII. The incorporation of counter-grav into the Mark XXX's suspension and power train went far towards offsetting the mobility penalties increasing weight had inflicted on preceding generations. The Mark XXX incorporated still further improvements to the hyper-heuristic capabilities of the Marks XXVII–XXIX, new dual-ply battle screen (which was not only more effective against kinetic weapons but also capable of absorbing at least some of the power of almost any energy weapon and diverting it to the Bolo's use), and a new and improved cold-fusion power plant. Weight dropped from the Mark XXIX's 24,000 tons to 17,000 and normal speed increased to 115 kph. For very short intervals, t