no the second model is not the battlemaster and the third is not the china dozer, and they were in no psrt adapted from those models.
The battlemaster actually was made to look like the t series of russian tanks but for some reason they couldnt name the tank t-90 or the crusader m1a1 abrams, so they modded them a bit and called them battlemaster and crusader. As for the Sesimic cannon, it was created from this ra2 concept, and did not use the china dozer in any way shape or form. thank you.
