O'Tink, THAT is a remarkable photo...makes you wonder how they even took it, with the technology of the day...
I actually learned more about WWI from Canadian TV; CBC. They do huge commemorative documentaries for the anniversaries of the major battles, or they did so 2001-2010. With 86 million deaths in WWII, I tended somewhat to discount WWI, but no more not after the CBC!
I think at that time there was one (or so) WWI veteran alive still.
For example, one battle where the commander just sat back miles behind the front line and kept ordering waves of troops to charge into hopelessly superior fire...it was a slaughter, tens of thousands died, just obeying orders on that one day. I don't really see how WWI could have made warfare worse than it already was, but apparently it did...changed warfare forever.