Advice on movie

[Stonefire]

Epoletov maybe you can help me. Way back in the mid '70 I watched a russian war movie in an odd Danish cinema. the movie were in russian with Swedish or English subtitles
I can't remember the name, but it involved a large tank battle (Kursk??) some female soldiers (tank drivers?) it must have been a long movie, because as far as I remember the cinema hasn't got the roll with the end of the movie, so I never got to see the end of it.
(or maybe it was part 1 of a movie in 2 parts).
For long time I thougth it was "They fought for the Motherland" but when I got hold of a copy - it was not this movie.
Do you have an idea from this meager information, I will appreciate a guess from you (or from some other war film buff out there).
Regards
Stonefire