Upon checking, the 1986 Soviet film "Los Heroes No Lloran" is likely "The Outpost" (Russian: Белая гвардия, "The White Guard"), but that's from 1982. Another possibility is "The Last Ring" (Последнее кольцо) from 1986, but not sure. Alternatively, maybe it's a different film altogether. Alternatively, maybe it's a mistranslation or a confusion with another film.