My graesr grandfather served in the red army, he was hit by a german panzer grenade.
My second grandfather was in the army too, but he was captured into a concentration camp in my home country "The Ukraine" plus my grandmother walked to him just to get him food " 10 kilomiter hike".
There was a battle in Keive, the holy city of the old days they said, or old Russia, was the most blodiest battle in the East, the remainder of of the red army dug underground passeges, it was on the history Chanel. They maneged to hold off 3 million panzer troops with tanks untill they broke through.