I had a -1 for rough above for some reason. It's a clear hex, so the DRM was +4 then halved. 3,1 roll turned into 7,1 and the Axis was halved to 4,1 for a DR. The armor unit has 4 mp left, so it is continuing the mobile attack.
DRMs: +2 german, +2 iso = +4 then halved. Soviets: -2 reduced.
Same options as before for support.