[Raellus]

Although it does seem strange that a "mobilization only" formation would be equipped with T-80s, it's possible that the division was issued with some newly-produced MBTs prior to the TDM or that it has since been issued with rebuilds. A division doesn't necessarily end the war with the same gear it started it with. Perhaps 124th MRD "scrounged" a few broken down T-80s from another division and, after repairing them, returned them to service in its own tank unit. It's also possible that the writers couldn't tell the difference between a T-80 and an upgraded T-72 (or even T-62), both of which seem more likely fits for a third-string MRD. It's probably a matter of the writers overlooking a previously established fact (i.e. a continuity error). That being the case, I still think one can create a rationale to adequately explain the gaffe.

Also, the 124th MRD lost most of it's armor on July 17th while on road march to a flank attack by 3-70, not in frontal attacks on dug-in M1s. I think you may be confusing 124th MRD's demise with 21st MRD's attacks on the blocking postions north of Kalisz in the wee hours of July 18th.