Franz Marc's "In War's Purifying Fire"

The professor instructed the subject of art must be embedded as the main theme. The professor instructed,
"Marc talks about the art that the war will create and how important this is for the future. Your sources need to
also have art as a reference point."
The professor wants this to be heavy on rhetorical analysis. This paper requires three sources. Please select
three outside sources of your choice. Do not use any in-class articles she listed. I prefer three outside sources.
I am attaching the prompt which is entitled "8.2 Paper One Assignment Sheet."