Findings. Is this a piece of art or a testimony?

On an attic, in Lyon, France. Then displayed on "her" ryad in Marrakesh, where we stayed last January. The painting impressed me because of the precarious state in which men where fighting during that war (WWI). Not that war is a safe activity ever, but the first image portrays in a pathetic way what being a soldier meant at the time. He is there all alone and his life rests on his back. The second photo is a card that shows the fights of armed and empowered men. They are more violent, for the struggle is manifest, but contrary to the other, it shows power, strength and vitality. The tragic war and the art of war.