In September 1939, thousands of German soldiers were turned loose on Poland. In 1940, they descended on Holland, Belgium and France. In 1941 they went to the Balkans, and then to the USSR. Armed with Leica and Rolleiflex cameras, some of these soldiers were officially commissioned as photographers, while others were asked by their commanders to snap records of events. Among them were trainees who knew about the Bauhaus, and other, older, men who...