I love the composition and your choice to make the piece monochromatic - it fits in well with the historical images that most of us have of WWI.
Your choice to use the white feather is intriguing, given the widely conflicting meanings that it held in that era. I'm glad that you referenced "White Feather Fallopian," since it gave me a context to understand that you were embracing all of the negative as well as positive connotations of the symbol. Quite interesting, especially when you think of the significance of Snape's anger at being called a coward.