Edit: Answered

I post this realising that this is probably a very loaded topic of the get-go. Briefly about myself: A mere two years back I was much more intelectually inclined towards conspiracy theories, and being German the ones about the Third Reich were never far from reach. Through an excellent history teacher I have learned to assess these claims more critically, but I find it hard to collect unbiased information on some of the topics that came up frequently. One of them are allied warcrimes, in particular the supposed purposeful starvation of more then a million German PoW at camps in the Rhine river, most often called Rheinwiesenlager. Is there truth to these claims? How big were these camps really, and did the prisoners suffer unusually high mortality? And if so why?