In my recent post, I was talking about a movie that I have seen afew weeks ago: "Escape from Sobibor". In this movie, we see what was happening in Sobibor death camp in Poland. We also see that the guards are not all german. There are a lot of guards that are from Ukraine. I didn't know that Ukraine was sending guards to help the Germans. Where do they come from? Does it mean that the Soviet Union was well aware of the existence of the death camp? Thanks for your help!