>>17762181 (OP)No.
2.500 were killed or wounded of the 15.000 who came in on the first wave. The survival rate is still substantially higher than for example Somme, where 50% of all British forces were killed or wounded.
And in terms of "terror" in regards to ww2, then Stalingrad tops everything as a German soldier. These men often shared the same building with their enemy, sometimes just a wall apart. They knew they were encircled and couldnt get out, they knew they would likely die if they surrendered. They could rarely sleep because of the constant presence of someone trying to kill them. They were freezing from -40 degrees which also made it difficult to sleep and losing body parts, and they were starving, their ransom was less than a slice of bread per day, and still had to do constant fighting.
It was a long mix of terror, exhaust, freezing, starving and hopelessness, that drag on for a long time.
I remember reading letters from Stalingrad, and pretty much all of them were to their parents, girlfriends, children etc telling them to try to live on without them.