Pfc. Harold Porter was a medic with the 116th Evacuation Hospital who were among the first Americans to enter Dachau, one of the oldest Nazi concentration camps. Although reports of such camps had surfaced over the years, it was the first time American soldiers had actually seen a camp for themselves. He eventually wrote a letter home to his parents which both attempted to describe what he saw and assure them that he was not making it up.
Warning, the content is graphic and you may choose to not read the letter. But you should.