You know I love pictures of prisoners of war and this one is one of the most amazing I’ve ever seen. I suppose 7A is the name of their barrack. This is truly a high-quality picture, probably taken by a professional. The picture was sent as a postcard by a soldier named Richarme to his family in French Haute-Savoie, we can suppose he was one of the portrayed chasseurs. There are not only French soldiers (chasseurs, but soldiers of the colonial troops, etc.); I was able to identify Belgian ones, British and even Russian ones!