Cdo 7 in Captivity

Here's what I know about these pictures. One of theses men (the dashing Ronald Coleman lookalike) is my Dad. He was captured on Crete and spent the rest of the war in Germany. My Dad never told me anything about these pictures. The only reason I have to assume they are from after he was capture is the fact that a couple of the prints have 'Photo-Trostel - Reichenberg' printed on the back. It's mystifying to me how at ease they seem - especially as my dad's experiences on Crete and in prison camp left him crippled with PTSD for the rest of his life.