Dressed in black uniforms emblazoned with the SS flash, Heinrich Himmler's horsemen carried the SS banner across the German countryside and to equestrian competitions throughout Germany and Europe. They rode as the Equestrian SS, an SS cavalry force designed to win elite support, to enhance social prestige, and to attract farmers to Himmler's essentially urban organization. The Equestrian SS was the only SS organization acquitted at the Nuremberg Trials. Yet the Equestrian SS trained to be a security and occupation force. In mounted Death's Head regiments in Poland and in the SS Cavalry...