Concentration camp train rides

As I reviewed Vonnegut's explanation of the transportation that the prisoners of war endured, it reminded me of the conditions described at the Holocaust Museum when I visited there in 8th grade. For instance, Vonnegut explained how Billy "had to sleep standing up, or not sleep at all. And food had stopped coming in through the ventilators, and the days and nights were colder all the time"(79). This description relates to the  hard knock conditions all the jews encountered on the trains to concentration camps and how they were not taken care of properly. In addition many people died on both the train of the prisoners in Slaughterhouse-Five and on trains to concentration camps. Since both of these events occurred in close to the same time period this may suggest a connection between the two accounts. i think Vonnegut wanted his reader to pick up on this correlation, it may serve some purpose down the road.