@hamburgboy,
I remember about Ypres. But not enough, will have to look it up again.
Hell of a photo.
My uncle was mustard gassed, an american. I never knew much more about his experience in the war. I remember him as the nice man who showed me how to make peach ice cream in Oklahoma when I was three or four, and died shortly thereafter, maybe early '45. Interesting guy, quite the southwest explorer.
I read a bunch of his book collection some time later.
He did come back after the war and get very involved re aircraft. Head of tool and dye or something like that at Douglas in WWII. (I know he worked out of Santa Monica, visited Wichita, Oklahoma City).
I still have his home tool chest.