Zhavoronok

It was during World War II, in the territory of Germany.

The Germans decided to test the combat abilities of a few brand new anti-tank guns against a real moving Soviet T-34 tank.

So they took some prisoners (including a Soviet POW - T-34 driver) from the nearest concentration camp, said them to sit inside of a T-34 (without ammo but with a little fuel) and to move along the road.

But the Germans didn't suppose that the prisoners didn't want to be a moving target only...

It is based on real events.

I saw it many years ago and do not remember all the details of the movie.