My father a”h was an officer in the American army in WW2.
He received two Purple Hearts for being wounded (twice) in combat.
He arrived at Dachau just a few days after it was liberated.
Even for a combat soldier, what he saw there was so traumatic, even with it being a few days after the actual liberation, that he would never talk to me about it.
I think that in itself says a lot about the incomprehensible horrors our people went through.