I appreciate the comments so much. This thread is slow to get started, but we have no time frame that must be met. I have no mental energy at the moment to offer much myself, but bfisher's comments sent me on an internet search.
The first two articles are from The Guardian. These were the sites that I found particularly interesting.
The first world war in German art: Otto Dix's first-hand visions of horror
Art of the apocalypse: Otto Dix's hellish first world war visions – in pictures
The Online Otto Dix Project