Red Army swarming enemy positions. Although the lack of dead soldiers indicates a staged attack for propaganda purpose.

Red swarm

Red Army human wave attack.

There are numerous accounts from German and Finnish soldiers who witnessed Red Army human wave attacks. They have in common the complete disbelief that Soviet commanders cynically would waste their own men in meaningless frontal attacks, and the horrors of knowing the Soviet soldier willingly would let themselves be slaughtered.

Human wave

A screenshot of a training film. A German panzer III (with a long barrel 5 cm KwK 39 L60 gun I think) used as a target. The shooter is (probably) a soviet made T-72 MBT. No surprise that a WW2 era tank will be obliterated by the shot from 125 mm gun on the soviet tank.  