Throughout history, war, has also been the subject of art. War is a breeding ground for intense emotions which in turn find their way into the canvas. And it's different from photojournalism because it's filtered through the eyes of the artist.
Staff Sgt. Fay is probably unique, though, because he actually fights alongside his unit. This gives him a somewhat unique perspective. Fay's work, as can be seen from his blog, seems to emphasize the weariness that war brings to the soul.
Other links related to Fay:
And check out this exhibit of art from World War I, sponsored by UNESCO on the occasion of the 80th anniversary of the armistice.