Two thousand nine hundred forty-five men lined up in four motorized columns immediately behind the German Army on June 22, 1941 as it prepared to launch Operation Barbarossa – the German attack on the Soviet Union – an attack designed to win the war. Their mission – for the glory of Greater Germany – was to butcher as many human beings as they could get their hands on – men, women and children who were at that very moment peacefully sleeping in their warm beds in dozens of large cities and scores of small hamlets from the Gulf of Finland to the Black Sea, and from the border with old Poland to the outskirts of Moscow. The field men of the Einsatzkommandos, the men of Bach and Beethoven, Grimm and Gutenberg – and now Hitler and Heydrich – were very thorough at what they did. Over the course of the next two years, by means of machine-guns, carbines, gas vans, explosives, rifle butts or ax handles, the field men would slaughter 1,300,000 people. The Field Men, a companion volume to MacLean’s The Camp Men: the SS Officers Who Ran the Nazi Concentration Camp System, covers the entire gamut, from the organization of the units, to the SS officers who served in this scourge on the Eastern Front. Some 380 SS officers are described in full detail and extensively analyzed. The photographic section of the book contains over 175 photographs, while detailed maps show the locations for each unit throughout the campaign.