Fascinating. I read up on that.
Thank you!
I ran across that in the last year. I was listening to a WWI BBC interview with a vet and he mentioned areas that were so bad back during the war that men would get sick just going near it. As an offhand comment, he mentioned "I don't think you can go there today". The interview was probably in the 70s. It made me curious and led me to "Zone Rouge".