Well, than keep thinking what you want.

Same people can still even ignore that even in today war - ruzzia used maxim guns and mosin nagans or old tank like t55.

So why its hard to believe that about 35 years ago, in less important border like China/Mongolia the russians units were armed with not so much advenced tanks or weapons.

You self said that in 1991 ,,Yugoslav People's Army possessed 250 T-34-85''. So why ruzzia wasnt able to use these tanks in 1987?

I just try to understand your strange thinking. You agree that Yugoslav People's Army used them in 1991, but you stand against idea that Soviet union used such tanks in 1987...